That's a good question. I see people on HGTV working from home, and wonder what they do. Writing is one option.
Amazon lets you publish for free. There are work-from-home IT jobs. The
Stackoverflow site list those. Trading stocks is another option.
Be wary of work-from-home scams though. And be careful of downloading anything from a work-from-home website. It could have malware, since it's probably a popular web search.