Using your skills for profit is a common trend with all of the best side business ideas. If you're an expert at something, there's likely an audience of people online who would be willing to pay to become an expert in your field—just like you. If you want to take your skills and turn them into an online course that teaches others how to get the same results you've achieved in your life, career, or business, start with How to Create an Awesome Online Course on Udemy, where instructor Miguel Hernandez covers how he makes over $90,000/yr teaching online. You'll learn from more than 8 hours of video instruction.
Keep in mind that competition is fierce right now; many people turned to freelancing when the recession hit to earn some extra money on the side. So you’re going to have to fight your way into this market. The good news, however, is that quality writing never goes out of style, and there’s far more bad writers out there than great ones. So if you’re good and you’re persistent, you’re going to find work.
Entrepreneurs experienced in the restaurant and bar industry who are looking to venture out on their own are best suited for this business endeavor. Mobile bartenders often work nights and weekends. This offers a more flexible work schedule, allowing you more time to focus on building your business during the week, and also spend time with family and friends.
Then you can move on to more immersive sales education through online courses like Sales Training and Prospecting on Udemy, The Guide to Pitching and Selling Clients on CreativeLive. Once you're ready to put your selling skills to the test, check out Angel List and see if any sales position opportunities align with your interests—the last thing you want to do is get stuck selling products or services you're not interested in. However, by starting out your sales career as a side business idea, that gives you the flexibility to easily change courses if you ever need to.
I created an “Every Day I’m Hustling” shirt and sold enough for the campaign to ship, but didn’t earn much on the experiment because of some not-very-effective Facebook advertising. Still, some opportunity here and a friend of mine is doing REALLY well with this. If you can create awesome designs and reach the right people with good Facebook targeting, Teespring can be very profitable.