Comment Re:From personal experience (Score 2, Informative) 118
"I feel like saying something to her right now, I should say it." - Good.
"I want to have sex with you" - Yeah, I'm sure it will work out well.
Any present actions have future consequences. Not thinking of the future means you ignore the consequences. That can't be a good thin.
As in pretty much everything in life, moderation is key. Don't over-think things that you end up never doing anything. But you still need to think things a bit. ("There is a time for thinking, and there is a time of acting")
The other reason for over-thinking is negative target fixation where one focuses too much on the possible obstacles, ending up scaring oneself too much to act. Fix your mind on where you want to go, keeping a peripheral view on possible obstacles.