1) Don't borrow trouble! Worrying about "what ifs" is a waste of time - half of them won't ever happen (so your worry is wasted) and you can't prevent the ones that will.
2) Would you rent a really really bad movie (like Gigli, or some slasher flick) and watch it over and over and over again? Of course not. So why keep "watching" these horrible memories and imagined scenes in your mind? Imagine a big red STOP sign whenever this happens. Resolve to turn off the rotten film and replace it with a "good movie" - perhaps some lovely fantasy of your ideal future, or a dalliance with Brad Pitt, or whatever floats your boat.
