* Write articles for other people - usually on topics I really don't have a lot of knowledge or feeling about to start.
* Mow lawns - I'm allergic to grass. Builds character.
* Labor - the harder the better. Beats the gym and there is no better way to turn a Budweiser into a $100 beer than sweating your tail off digging a ditch.
* Help startups bootstrap or otherwise avoid "the man" while they find their dream.
* Sell chicken eggs when the hens push more than I can French toast.
* Make films, music, stories, pamphlets...often these cost more than they make, but I refuse to call them losses. Slightly passive income stream.
* Consult - since I was 11 in '81 I've been paid for helping people with their broken technology. I'm not exactly on the edge of all tech like I was, but I still serve a purpose.
* This is an odd one, but I have found it at least as profitable as a few side projects over the years. Be lucky. Actually look for money on the ground ($143 last year), win prizes, expect financial benefits from transactions, assume your (educated) choices will make money.
* Sell plant starts - a little late for this year, but it's one of those things you can save seeds from your regular groceries / food prep at home and early Spring...ba-da-bing ba-da-bang...kind of almost free plants!
https://www.quartoknows.com/books/9780760361603/No-Waste-Kitchen-Gardening.html
* Investment clubs - getting a small community of a tech nerd, business geek, social butterfly, and either an accountant type or law dog, plus whatever else you happen to be friendly with, you can end up with a very smart engine for investing. Invest in either public stock, local businesses, people with ideas, or projects of your team's own creation.Have fun, and profit!