Well, to begin with you might think why would somebody want to freak out over nothing? This is just for fun guys don’t try to freak out looking for reasons.
Here is what you can do:
Just let your mind to wander and never stop it. You will have plenty of things to worry about of things went wrong, things you could have done differently and so on.
Now, invest all your energy and get frustrated as you know there is very little you can do about certain things. Continue and get to detailed analysis.
If you are loosing the track of your thinking remind yourself of how crazy and insane you are and bring the thought process back.
Start questioning your logical thinking and prove it wrong and continue with the worries. Continue till you are really out of your mind.
Try to take it head on and do something about it, when you figure out what you must be doing destroy it immediately and decide to keep things to bottled up.
Now, that you have decided not to do anything about your worries just try and hold on to it as you will be used to it and slowly it will be at back of your mind. Don’t worry you will find another stupid issue to worry about then again start from step 1.