Thanks for the advice. I'm not exactly sure that this is something that could be cured medically. I'm pretty sure this is just a personality thing that I should probably work on.

I should probably see if I can find a good book on it, but I'm not sure it's something that can be changed. If it was precipitated by some traumatic event, then I'd be a bit more optimistic about fixing it. I think it's a natural temperament thing.

(On a side note, it's funny how you can have so much insight into your own behaviors and yet repeat the same mistakes over and over...)