I know what stupid choices I tend to make when I'm too wired and energetic... so I've got a bunch of little personal rules set up for myself. It MOSTLY stops me from making those decisions... but not always. Sometimes I just go "why did I ever make up that rules? That's stupid. I want this and it's A-OK with me to do it!" but most of the time I can combat that with "because you KNOW when you want to not listen to the rule is when you NEED to listen to it!" haha.

Other than that, as Sometimes said, I tend to keep a fairly strict routine at home which I try my best to follow.