New ask Hacker News story: How do you deal with rejection?

How do you deal with rejection?
2 by solididiot | 3 comments on Hacker News.
You've probably been there. Interview after interview after take-home test after pair-programming session to only get a vague templated email rejection without any real info on why you got turned down. How do you deal with it? I personally find it increasingly difficult to be polite about it - especially as I grow older.