learning to laugh

Don't misinterpret the title of this post. I know how to laugh. But I also know how to get extremely frustrated and angry.
So recently I've been learning how to laugh at myself and at situations that would normally make me very upset. It's a learning process about not focusing on things I can't change. The operative word being "process."
My goal is to be able to one day 'laugh things off' and say "well, that's dumb, but whatever, I can't do anything about it."
Workin' on it.