I feel like this is something that doesn't get talked about much, and am interested to see how everybody deals with failure, be it on an academic, professional, or personal level, and if this varies from culture to culture. Do you move on and forget about it, do you learn and change from it, etc.
I tend to get angry at myself and mull over mistakes at the end of the day, until I figure out a way to prevent the same thing from happening again.