Jumping to Conclusions

Jumping to conclusions is something that all people do. no seriously- all people do it at least every once in a while. I hope they do, because I seem to do it more than my fair share. Lets just say I'm known for doing this with my really good friends. It is part of my personality, and something that I wish I had better control over, but sometimes it just comes out and bitch slaps me before I can even do anything about it. And at the time, I feel justified in what I am feeling/getting upset over, but in the end, I end up feeling slightly foolish, but still somewhat justified. Now the question is, how do I stop doing this so often, or at least waiting until I have all the information necessary to either jump to conclusions or not?

Honestly, I have no idea. So many factors go into why I do this (along with so many of my other character flaws). Should I start letting things from the past go quicker, or letting them go altogether? Probably. Should I try and get all the facts before I assume the worst, or at least the worst when I believe it is going to affect me? Totally. But the question still is how to do this. Again I don't know. I've done it again today, and completely upset a friend, and our relationship has just started to get back to a state of semi-normalcy. And while again, I still believe that I am justified slightly in my thinking, I handled the situation the wrong way. And I don't know how to fix it. Apparently I'm not over some of the things from the past, things I thought that I had moved past, but I guess not. So if anyone has any suggestions for me on how for me to at least act less crazy, I would greatly appreciate it. But really, we all know that's all it is... an act. But suggestions on how to hide my craziness better would be greatly appreciated :)