Every website owner (including myself) hires copywriters to write content for things like about pages, FAQ's, or blog posts. Hourly wages for novice copywriters are not very high, but with some experience and a growing portfolio, you can become a freelance writer today and soon be charging more than you make at your full-time job if you find the right clients and brand yourself as an expert with this side business idea. Check out one of my most talented friends, Jory Mackay, for an example of someone who's doing a great job of positioning himself as a premium service-provider with his freelance writing side business idea. Then when you're ready to start cold emailing potential clients, pick up my free downloadable freelance proposal template and get started today.
Thanks Steven. I’m all about fresh air! I run all of my side hustles through an LLC, so I can also take some deductions come tax time. It’s a win-win. I also do my best to pay quarterly taxes on the income, but sometimes really misjudge based on cash flow. I’ve gotten stuck with a few pretty big tax bills, but now I’ve gotten a better handle on it. LLCs are pretty amazing.
Mechanical Turk operates much like TaskRabbit and GigWalk: it’s a corner online where Amazon gathers tasks to be done, people willing to do them, and people willing to pay for them. On Mechanical Turk, you get to do the oddest jobs you can imagine as an online business idea, made possible by a parallel online universe that runs on hits, visits, surveys, reviews, pins, likes, CPCs, reads, and other metrics. But don’t get too ambitious. The small sums being paid out to human Mechanical Turk users rarely add up to anything seriously substantial, even if you invest most of your spare time into it. It's a better opportunity for internationally-based people with internet access and lower costs of living than in the US. Here’s one person’s account of his former life as a Mechanical Turk talking through how he got started with  this business idea and what the experience was really like.

Selling Information Product Tip: With this side hustle, focus on niches where people have a huge problem they need to solve. If you’re in the fitness niche, you can create a fitness workout course or a diet plan with recipes ebook. If people are desperately trying to solve a burning problem, there’s an opportunity to provide value by helping them solve that problem. The content you create can guide them towards a solution. Best part: you could make money while helping people.

Not only can you start sourcing freelance writing gigs on the side from sites like Upwork, Cloudpeeps, and Flexjobs while holding onto your day job, but once you've built up your client base, it's a business you'll be able to run remotely from anywhere in the world. All you need is a laptop, an internet connection, and a solid list of regular employers.
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.
Did you major in a subject like English, history, or math in college, or do exceptionally well on the SAT exam? Do you have patience with children? If so, you likely have what you need to tutor kids in particular subjects. Seek out parents or teachers and let them know that you tutor students in a certain subject, and offer materials for them to share, and phone calls will often trickle in. You can get going locally or expand across the country by offering to tutor online.
Think about websites like Udemy, which gives teachers a platform to teach online courses. A business like this allows people to share their expertise with students while making a living—all without the need for a physical location, or even a set schedule. Or maybe you prefer to approach things a little more creatively. If you’re crafty, you might consider a custom phone case business, which helps you lets customers add personal flair to their phones.
I can’t say enough about dog walking and pet sitting. I’ve been doing this for over two years, and my business has grown to the point where I was only home 4 days last May. The place I’m at now has a pool, and the next place has a pool table. I love dogs but can’t have one of my own, so I also get all the puppy snuggles I could want. And the startup cost is very low.