Do you have a big ticket item or two that you only use part-time? We are living in an age of “peer sharing” which has opened a door to earning income from renting everything from RVs (Outdoorsy) to sailboats (see Sailo). This works for smaller items, too. KitSplit lets you lend out professional cameras. If you have a desirable item that costs more than the average person can afford, someone out there may be willing to pay to borrow it.
Join a startup accelerator: Another great option is to apply to a startup accelerator like Y Combinator, 500 startups, or TechStars, where a group of investors will help coach you, connect you with potential partners, and provide startup cash in return for a small stake in your company. The competition is tough to get into these, so don’t rely on them as your only path forward.