Get paid to search the Web. Sites like Swagbucks.com and Zoombucks.com will pay you to use their online interface to search the web. To qualify, you need to be willing to download their search bar and use it for everyday Internet use. The only caveat that comes with this “gig” is that you might be paid in gift cards instead of cash. If you can parlay those gift cards into items you need to buy anyway – like groceries or gas – searching online can be a lucrative way to spend your free time.
People are always looking to have their cars washed and detailed. You could be a mobile car washer and detailer without having a permanent location. Reach out to people you know or make some flyers and put it in your neighbors' mailboxes. If you want to get serious about it, prop up a one-page website or give out business cards. You can make money quickly doing this.