I don't care about making money with my hobbies, I do them to help me feel better and have some good time. As a whole we're all already way too focused on making money, at least that's what I think.

• Long walks. Daily. This is the (second) best change I ever made into my life. I would encourage anyone, even more anyone that is like I was (in a very bad physical and mental shape) to give steady walks a go. Start small but don't give up even though It's hard to begin with, and slowly increase the distance you walk and your steadiness. It's so much worth it. I was a potato couch but nowadays I could not not go out for a few miles walk at least once a day (as much as possible I'll go everywhere I can by walking instead of using any mean of transportation). It also helps in the head, immensely as far as I'm concerned.
• Writing &
• Reading. Reading and writing should never go without the other as far as I'm concerned. Read (like you write) widely, don't be afraid to read stuff you don't normally read, or stuff/author you don't like (there is a lot to be learned when confronting your own thought to those of people you don't agree with), or read unpopular stuff.
• Sketching/painting. I'm not an artist, I don't care I just enjoy doing it. I try to do more of that outdoor, while I'm out walking)
• DIY, making stuff with my hands (book binding, woodworking,... those come and go along the years) & also
• Fixing stuff. Reducing the amount of waste we create by making our stuff last a little longer.
• I had to quit model making, but I liked that a lot.
• Music.