School notes - keep or throw away?

[canadajen]

Question ...

What did/do you do with all of your class notes once the class is over?? Roundfile/recycle/Burn them? or Keep them? for how long?

I've graduated now, but will soon be returning to school to continue my studies, and can't decide what, if any, notes I should keep from my undergrad program. I have 5 boxes and need to make some quick decisions.

Help! What did you do? ...