More than 400 people were surveyed and asked the question, "What's your side hustle?" The side businesses in this presentation are the most popular responses.
These business ideas include everything from photography to real estate, but many can be started with little upfront investment. The common theme throughout is they can be done on a part-time basis in addition to your regular 9-5 job.
I've included links to more in-depth information if you want to learn more about a particular business idea.