I think about this all the time and I've never really told anyone, may be I'm going crazy. Have you ever thought about all the times that you say to yourself "If I hadn't done this than this wouldn't have happened. Why did I have to do that?" Or if you said to yourself "Why did I have to make a right turn here and have a wreck? " You think "It's just my luck to turn that way and something bad happen" Now, have you ever thought about all those times you didn't turn right, you went left and nothing happened, good or bad. Just uneventful. How many times today did you take the turn or make the decision that made your life uneventful and you had no idea. Million times today you could have been a hair away from something bad or something good. You'll never know.
Or have you ever thought, "Wow, I'm glad I did that certain thing or made that decision a long time ago so that I got to where I am now" But what would have happened if you had chosen the other thing in your decision or went a different direction or whatever? For all you know you could have been a millionaire (or whatever it may be) right now, but instead you are average. So you should be mad at yourself for choosing what you did, but you dont know this so you are praising youself. But then of course you can think "Why did I do that? I'm doing terrible!" But what you dont know is that you would be doing a lot worse had you chosen the other option.
Of course I can ramble on all day about different ways things could have happened. These are just some of my random thoughts. I try not to think about this too much though, because I could drive myself insane, with these thoughts.