Go ahead and flame me if you want, but I do like me my taco bell. Chipotle and Moes are obviously better but they’re so damn expensive now. I’m sure when my GI tract shits the bed that opinion will change though.
My understanding is that upvotes don't do anything themselves, boost functions like a reddit upvote in that it will bring a comment or article to the top of the queue. I use it as a 'people should see this' button.
Things that I like to do that can be done totally for free:
Learn to read/write/listen to (classical) music (playing probably requires an instrument - not cheap, unless you choose to sing). There are plenty of open music theory textbooks online, I like this one. You can use MuseScore as a composition tool. Its playback and formatting (engraving) of the sheet music are very good. Additionally, if you want to try applying what you learn to pieces written by classical composers like Beethoven and Mozart, IMSLP has sheet music for over 200,000 pieces.
Sudoku. You can use Hodoku to generate new puzzles and teach you new methods to solve them.
Chess. Just google en passant. More helpfully, lichess is a 'free/libre, open-source chess server' that can teach you the basics of the game and pair you with other players in time formats ranging from 1 minute per player all the way up to 30 minutes per player, with 20 extra seconds per move. If you want to play IRL, a basic chess set is very cheap. Once you get into it, chesstempo is the best place for puzzles.
Learn the basics of a new language with Duolingo or other similar websites.
These are just a few things you can do without spending a dime. If you're willing to invest a little, the world is your oyster.
Go ahead and flame me if you want, but I do like me my taco bell. Chipotle and Moes are obviously better but they’re so damn expensive now. I’m sure when my GI tract shits the bed that opinion will change though.