Tabletop RPGs. It allows me to work on creativity and problem solving skills. I can also practice improvisation when I’m running the games.
Anki is a FOSS flashcard program that is popular in language learning circles.
How’re you all handling the auto restarts? I’m running my server off of a Linux box, and I was thinking of running a cron job to do the restarts, but couldn’t think of a way to check the server status from the command line.