As the saying goes, one person’s trash is another’s treasure. Without people cleaning up everybody else’s junk, the world would be a lot messier than it already is. This business idea might not be glamorous, but you get to make the world a cleaner place while earning extra side income. To start, you’ll likely need a sturdy second-hand truck and standard equipment like shovels, wheelbarrows, sledgehammers, rakes, and garbage cans to launch the foundation of this side business idea.
This is a great business for animal lovers who enjoy walking and staying active. It’s ideal for people who prefer lower stress levels, since spending time with pets has been shown to reduce stress. Those who are compassionate and responsible, yet prefer to work alone and be their own bosses as well as make their own schedules thrive in this type of business.
“The essential guide for anyone who wants to create more freedom, opportunity, and security by launching a profitable side hustle” On his popular podcast, Chris often says, “Inspiration is good, but inspiration combined with action is so much better,” and Side Hustle provides both. It’s packed with practical tips and strategies—illustrated by compelling stories of real-life hustles—that will inspire readers to start their side hustles now. “- Gretchen Rubin,  bestselling author of The Four Tendencies and The Happiness Project

As I’ve already covered with TeeSpring, the T-shirt retailing business is worth millions of dollars. But what if you want to do the manufacturing side of things? T-shirt printing turns out to be quite a rewarding business idea for many each year, but can quickly consume much of your side business idea time—so know what you're getting into before diving in. This multi-billion dollar industry counts big corporate factories as well as home-based part-time entrepreneurs.
Great list…a few are a bit humorous. Nevertheless, side money is still side money. An I am a firm believer that everyone should have something they do on the side. From my own personal experience, having something on the side helps takes the pressure of the main income source (both mentally and financially). If all you have is a single source of income, and if for whatever reason that source of income is threatened, the news is almost always devastating and life changing.
Many of my readers have started proofreading from their iPads, scanning legal documents for court reporters as a result of the Proofread Anywhere eCourse I recommend. You can read some of their testimonials in the comments on this post. They offer a 7-day intro course free so you can decide if that line of work is right for you before you pursue the training.

If you start babysitting when you’re younger and gain experience, you can charge more. Parents love to be able to go out to dinner and know that they’re leaving their kids with someone trustworthy. Start small by offering to babysit your friends or neighbors’ children and then make sure you advertise your services on Facebook as well. Do a great job, and your business can grow simply by word of mouth.
This job is ideal for someone who is good with both technology and people. It is necessary to be good with technology because you must know your way around the hardware and software necessary to print onto a variety of different surfaces. You must be good with people because your clientele is potentially very diverse—the professional who needs new business cards may be very different from the college student who wants to order an ironic t-shirt.
“There's a great temptation to assume that side hustles are just for "special people," like artists, dreamers, and 17-year-old computer geniuses. But Guillebeau deftly proves everyone can (and should) have a side hustle. More than that, he shows you how. He is living proof that this book works, and so are the many people who have followed his roadmap.”-  Jon Acuff, New York Times Bestselling Author of Finish 
A real estate appraisal business can be operated from home, on a part-time basis, making for a fun side business idea if you have the credentials to back it up. A perfect option if you want to keep your day job while earning a little extra on the side. You won’t need a college degree to start in on this business idea, but you’ll need bankable appraiser credentials (including relevant training and professional licenses), strong knowledge of the sector, and a growing network of industry players including mortgage brokers, real estate agents, banks, and fellow appraisers that'll want to utilize your services.
So where does the money come in? As your audience starts to grow and you begin attracting more and more traffic, a whole array of different blog monetization options will open up to you. It’s best to choose the most organic ways that won’t detract from your blog’s reputation. For example, if you’re blogging about walking as a hobby, start selling custom walking trail plans or promoting walking boots. As mentioned earlier, it’s best to have multiple sources of income, as any one of them can shrink unexpectedly. The five main categories of income streams that bloggers tend to adopt are:
With nearly 100,000 different custom extensions both free and paid available in Google Chrome's marketplace, there's a huge opportunity for creating a useful extension for people to use while browsing the web as a low effort business idea. One of my favorite Chrome extensions, Yet Another Mail Merge, which enables you to send bulk customized emails from within Gmail, gives you 50 free credits to send emails and gives you the chance to upgrade to a paid account to unlock more sending—a great upsell for the people who are getting value from the extension. Even free Chrome extensions like SVRF Tabs by SVRF, which replaces your new tab with stunning VR and 360º images, have the potential to bring in new users and eventually drive revenue for the startup's core business. Another fun example from a friend of mine, Kathleen Garvin, is Hide images with NOPE, a Chrome extension that hides images on the web pages you're browsing—to help eliminate distractions and keep you from seeing images (like those of certain politicians) that you may want to hide. This side business idea is particularly great because it also allows you to showcase your development skills—which can be put to work as an adjacent side business idea on a freelance basis alongside the Chrome extensions you launch.

Side hustles are my jam. Seriously, I wouldn’t be a millennial millionaire and have achieved financial independence at the age of 30 without side hustling. I’ve always been hustling. It’s in my blood. I can’t help it. Everything I look at in life I see a business opportunity. Sometimes it’s a blessing and sometimes it’s a…. well I guess it’s always a blessing. #gratitude
There’s a huge online demand for English teachers who have the patience and willingness to regularly coach people over Skype. What’s more, is that you can easily make upwards of $25 an hour from people in places like Hong Kong or the United Arab Emirates, and it can even open doors to travel the world. While full ESL (English as a Second Language) accreditation is recommended, you can qualify as long as you’re a native speaker. Sites like Indeed, Learn4Good and Remote.co often post remote English teaching jobs, but stay abreast of the latest postings because available opportunities and fees vary.

Build up a following on your Instagram account and you could quickly be approached by major brands, gear companies, and other relevant businesses that sell products or services related to the type of content you share on Instagram—creating multiple potential side business ideas that'll come to you. If you have the right marketing skills and hundreds of thousands of followers, you can easily charge anywhere between $500 to $5,000 per post (or more)—which makes for a very profitable side business idea. Check out this fashion Instagrammer on ThePennyHoarder, making a significant income from brand sponsorships. Once you get some traction, to cut down on the amount of time you spend uploading images, you can make your entire workflow more efficient by posting photos from your Mac or PC.

To start an affiliate marketing business you’ll need a strong online presence. The most successful affiliate marketers run blogs, websites or newsletters that enjoy high levels of readership. This passive income technique is based on the idea that the products and services you recommend are strongly targeted and relevant to your audience and don’t feel like outright selling. It’s also essential to always be transparent about your relationship with the affiliate partner to avoid losing your reader’s’ trust.
Regardless of your status, you can become a virtual yoga coach. Consider offering private lessons online via Google Hangouts or Skype; or even making and selling pre-recorded videos that your clients can follow at their own convenience. With so many people traveling for business or pleasure these days, this is a great way for them to stay connected with their practice, regardless of their physical location.
Look specifically for how your competition built their side hustles. Use Google, Pinterest, and Amazon for this. Try to find out exactly what they did, or take a look at their websites and analyze their business models. There’s no need to re-invent the wheel. Of course, you’ll make it your own – you’re not stealing anything from them. But everyone learns business from everyone else (something this took me a long time to learn). So, take a nod from the best in your niche and start there to research how you can start your side hustle.
Next, let’s tackle one of the most popular online business ideas – affiliate marketing. So what is it, exactly? In a nutshell, you recommend products or services offered by a chosen company to your readers, followers or people you know. If they buy something as a result of your recommendation, you get a commission (either a percentage or a flat fee). Easy, right?
If that isn’t enough, you can expand your services to include pet grooming as an extra side business idea. To do that, you'll need to have relevant training, an operating license depending on your location, and pet grooming equipment. According to PayScale, pet groomers have an average salary range of $17,600 to $48,500. Not bad as a side business  idea if you can find a way to get in most of your clients on the weekends.
Are there people at your full time job who come in with an expensive coffee each day? If you have a machine at home that could recreate that same beverage each day, offer your services at a reduced rate. I knew a woman who provided coffee for four of her coworkers every day. She bought travel mugs inexpensively and made coffees to her coworkers specifications. They were available every morning, hot and perfect for just $1 a day. This saved her coworkers $3-4 each day and made her money on the side. Plus, she was already making her own coffee, it didn’t ake much extra time in the morning to make a few more.
If you love to travel and find yourself randomly searching for airfare sales or browsing Lonely Planet, why not carve out a niche for yourself as a private travel agent? Take my friend, Mark Jackson's lead with what he's doing to build a travel consulting side business idea. Start with word of mouth recommendations from friends who know they can count on you for the cheapest flights, create a Facebook or LinkedIn group to invite people who want to stay on top of the latest deals and eventually you could spin this business idea into a full-time consultancy teaching people how to make your dream trip a reality.
This list offers some great ideas and inspiration for folks looking to increase their income. There’s really no reason that anyone with some ambition, a good work ethic, and “people skills” can’t earn some extra money (or a full-time income) pursuing some of these self-employment ideas. I’ve done a little research, myself, to compile a list of small business ideas, and stumbled upon a few possibilities which you didn’t cover:
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