My 20’s followed a pretty basic pattern: Travel. Run out of money. Come home. Save money. Travel again. Repeat.
There was a problem with this pattern — at best, about 75% of my time was being spent at home saving for the next big trip, and I tended to be bored out of my mind in these intervals. I was trying to spend as little money as humanly possible so I could save up and get out of the country again, which meant going out as infrequently as possible. Which meant sitting in a room, slowly going insane.
This is, obviously, not a particularly healthy way to live — you can’t just muddle through three quarters of your life and expect to die satisfied. So I’ve found a few things that help fill the time between big trips.