How to undo the damage playing blitz has done to my brain

I have been playing blitz & rapid for only a couple of months not too long ago and now I can't play slow chess anymore. I don't take my time to think & analyze my game anymore, instead I quickly find a good-enough move and go for it. I know there is no rush, I know that i have plenty of time, I know I should analyze the positions thoroughly, but I keep playing quick moves anyway, like an addict that can't resist taking drugs. I have very little patience and trying to get the game to end quickly, even though i don't want to. 

Before I played blitz, I didn't have any of those issues and I was performing way better in slow tournament chess. Any advice on how to get rid of these bad habits, besides quitting playing blitz and play more slow chess?

Sit on your hands.

Is true