Find a profitable niche. Starting with your interests, write down as many niche ideas as you can. Think about topics people might search online. Ideas include passions (like surfing or body building), fears (like spiders or speaking in front of crowds) and problems (like getting out of debt). Do keyword research to see it others are interested in the topic. Find out if a domain name is available that matches the keyword 100 percent. 
If you have the gift of gab, public speaking is a worthwhile side business idea for you to pursue. Many authors, medical practitioners, scientists, artisans, politicians, and other subject matter experts earn extra income by delivering speeches, seminars, and presentations. Professional motivational speakers earn an average annual salary of around $90,000 with just that portion of their income, making this a very realistic side business idea while you continue practicing your craft.
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.
29. Videos – This could be an entire section on it’s own. Many people have made money by creating YouTube videos. Evan of EvanTube is a kid and he has made millions by creating reviews of products that other kids his age would use. It’s not easy to get views into the millions, but once you do, you’ll start seeing some cash come in. Many bloggers have completely turned to videos to get their point across by starting a video blog.
Running and charging for webinars can be a great way to build a following in your niche, demonstrate that you are an expert in your field, and make a profit. Hosting a webinar can be hard work. They need to first be promoted, provide original and valuable information, and include interactive elements so your audience can ask questions and engage with your topic. However, once you have built up a large blog following, each webinar can be extremely profitable.
Have a talent for crafting or creating other handmade goods? From bracelets to phone cases, rings, furniture, and more, Etsy is one of the world's largest independent marketplaces that’s perfect for anyone who is creative and willing to sell their handmade creations. As long as you have the space, this can make for one of the best home business ideas that can be started as a side hustle with a very limited investment. Consider these 5 steps to starting an Etsy store, from Handmadeology. Then, after you're able to build your brand and grow your own audience, you can start an eCommerce site of your own and retain a larger portion of the revenue from your product sales—making this a very lucrative potential business idea if you're able to find an audience that loves your products.
What It Is: What better way to alleviate your travel bug than to work as a remote travel agent or consultant? Whether part- or full-time, spend your working hours dreaming up itineraries, flight plans, hotels, and activities for clients looking to travel far and wide. Then, take advantage of your discounts (hey, perks of the job) and go wherever your heart desires, whenever your heart desires.