I love laughing. I surround myself with people who make me laugh. If I am alone, I laugh by myself, and without fail I laugh at myself. No matter how bad things may seem to be, laughing will make them better. Chances are you will run across things in life you cannot change, even though you wish you could.
Everything without argument cannot be fixed by simply laughing, but they can feel better if you do. If it is funny, I am going to laugh. If it is funny enough I will laugh out loud regardless of where I am. If someone else chooses not to laugh that is okay too, but it is probably their loss.
No matter what the issue is, it could probably be worse, so you might as well laugh about it if you can.