Not only is Airbnb a great way to make money by renting out your spare bedroom or living room couch as a legitimate home-based business idea, but you also have the benefit of meeting new people and making new friends if that's your kind of thing. You can even rent out an entirely new apartment just to manage as an Airbnb side business idea, but don't make the mistake of thinking this will be a passive source of income—you're on call whenever you have a guest and you'll always need to keep the place clean for incoming visitors. On top of just renting on Airbnb, you can take this business idea to the next level by offering your guests add-on and personalized experiences for an extra charge. Take Lauren Gheysens' Airbnb-based side business idea, Royal Day Out in London, England for example—where she gives visiting tourists a local's only tour of the city, complete with bespoke 18th century costumes.
Just by owning a DSLR camera or having access to renting one that's affordable, you can charge friends and local professionals for new headshots, which can be a very effective side business. Many successful photographers started out by shooting on the side and building up their portfolio of work, thereby establishing a local reputation enabling a launch of their own photography business.
A test prep business often helps prepare customers for tests such as the SAT, ACT, GRE, MCAT, and LSAT. The business may also help customers prepare for other tests. You may instruct clients by themselves or as part of a group. Your business may be located in a separate office, or you may visit clients; alternately, you may conduct lessons entirely online via services such as Skype.
If you’re still not having any luck with the jobs I've shared above – check out FlexJobs. The company has a A+ rating with the Better Business Bureau,  along with a money-back policy if you are unhappy with the website. FlexJobs guarantees that every single job is hand-screened for legitimacy. This is a great way to search for legitimate work at home jobs without the hassle of dealing with scams.
Like drinking beer? Why not try making it yourself as your side business idea? With enough patience and skill you might end up brewing something that others are willing to pay to drink. Pick up an easy-to-use starter kit from Mr. Beer online, invest the time it'll take to perfect your craft, make a unique brew and start shopping it around to friends & family to see what they think of this side business idea.
If you don't find what you're looking for there, here's a list of the 45 best places you can learn to code for free. Once you command a knowledge of HTML, Ruby, Python, Javascript, or CSS, you can start a freelance business as a side business idea to build your portfolio while you still hold onto your full-time job. Listen to my podcast interview with Laurence Bradford about her journey to become a freelance web developer, too. And over time, you'll build more relationships, have more experience and eventually take this side business idea over to becoming a full-time source of income.

“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 
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
I am a somewhat longtime reader and subscriber, but you can say that I am one of the biggest failures here. I need money, I am unemployable, and I have no (ABSOLUTELY NO) marketable ideas. Any idea I might have falls in one of three categories: 1.) Too specialized in too esoteric a field, 2.) Workable if I could just get other people’s interest, which I can never do–I have tried, several times, and 3.) Stuck in a chicken and egg dilemma–I have no idea where to start. So, to restate, either the work would be useless, nobody wants it, or I have no clue what the work is. How can I even manage? Is it too late? Am I truly worthless? I hope not, because I can never get up the nerve necessary to end it all.
Of all the suggestions on our list, driving for Uber has unique perks: no time spent on your feet, and not all that intellectually challenging. There is a lot to be said for a side business that still enables you to focus your mental and physical energy into your dream startup, so if you are concerned that a side business like freelancing may stretch you to capacity, driving for Uber might be a good fit.
If you enjoy working from your laptop, then becoming a virtual assistant may be exactly what you need. We use a few virtual assistants for Money Peach and one of them earns over $10,000 per month as a VA. Other places where you can become a virtual assistant for an agency where they find work for your is Upwork. They take a 10% fee, but 90% is still a great side hustle.
To market yourself as a consultant, you will, of course, have to be an expert in something. But, as Brett rightly says, “most people starting a business are.” What are you good at? What skills from your career can translate over into a viable consulting business? Think about your previous duties and areas in which you have excelled, and go from there.
If you want to find a profitable online course idea in the next 3 days, join my free online course Find a Profitable Business Idea today. It'll walk you step-by-step through the process I've used to generate more than $15,000 in online course sales in a single week. Then once you're ready to start teaching your own online course, I recommend using Teachable, the easiest and most affordable platform to use for creating, hosting and selling your online courses. They also have a ton of free educational resources about how to get started with creating an online course (yes, even as a side business idea) when you sign up right here.

If you have a talent for helping people look their best, and know how to mesmerize with eyeliners and turn heads with lipsticks, consider using your beauty skills to pursue this easily profitable side business idea. For under $2000, you can start your own make-up artist business which can make for the foundation of a potentially lucrative side business idea that turns a profit largely by referrals and word-of-mouth from your happy customers.
It’s not on this list but Brand Ambassador/Promo work is another very flexible, fun, and lucrative side hustle! Basically you promote your favorite brands at awesome events (e.g. handing out Red Bull or demoing new products at high foot traffic areas). I created an entire resource website on how to succeed in this industry called “Brand Ambassador World”. It has everything from resume designs, to super helpful tips and tricks, to where to find promo gigs, to a comprehensive list of agencies, etc.
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