i think its possible to think too much, because thought is limited..sometimes you've got to let go of intellectualizing things..if its your nature to think alot then do it..but if you feel your missing out on something cuz your "thinking too much" your probably right..and should act before you...
i hear ya man,
i lose it sometimes, i got a really bad temper, but to be honest it takes alot to get me rowled up now, i boxed for years and after a while i just kinda mellowed out..it may not be the easiest advice but an outlet like workin out or boxing really does help..it makes the everyday...