If the time it takes to market an online course is unappealing, consider promoting and teaching your course on Udemy. This site allows you to monetize your niche skill set and get paid to teach the course any way you like. Courses on listed on Udemy right now are “Body Language for Entrepreneurs,” “Microsoft Excel 2010: Advanced Training,” and “Java Tutorial for Complete Beginners.”
Another option is to take photos locally for homeowners. Many people don't have good home listing photos of the home they're trying to sell. If you notice, many of these pictures, aside from the ones done by professional photographers, have bad lighting, show clutter, etc. If you're good at taking pictures and have a nice camera, you might be able to sell your photo taking services to real estate agents or to people trying to sell their own home.
Even if it’s a mundane task like walking dogs, you could start the next (or only) full-service dog walking and grooming service in your town, where dog owners rave over your business and always refer you to others. You can hire other dog walkers as you grow, and turn your side hustle into a sustainable enterprise. You just have to do the work, and do it well.
There are different ways to market an ebook. One of the most common is through Amazon’s Kindle program. They can help you with all the steps to both publish and market your ebook through their incredibly popular platform. There are some specialized sets of writing software that will help with not only writing your ebook, but also formatting it correctly for the Amazon market as well Barnes & Noble and iTunesget traffic online