There is so many ways to make money/bells in Animal Crossing! What's your favorite? It could be beetle hunting, selling perfect fruit or something on here. Mine is beetle huntin on they island!
I like beetle hunting. I'm a bit too absentminded to take advantage of the turnip method, as I'll most likely completely forget that I had them, and I don't have enough trees to sell perfect fruit. However, beetle hunting allows me to relax and watch a few videos while I do something that doesn't take too much thought.
Definitely hunting on the island! I make sure to do that at least once every night after 7. If I'm busy I'll do it from 10-11pm until Retail closes. I normally make over 200k bells each time ^^