I tore my ACL too. Work on PT all the time, it's priority #1.
Basically enjoy the fun of failure. Sign up for classes, read books, go to museums, do all the things you didn't have time for when you were skiing
Go to a craft store and pick up some crafts. They're super fun and time consuming.
If people want to bring you gifts, tell them to bring a puzzle (awesome time killer)
I've been learning how to bake which is a pretty delicious and cheap hobby