I'm the same way. Started doing meditation about a year ago. It's the only thing I've ever done (aside from drugs) that stills my mind.
I can not shut my brain down at night, so I smoke a lot.
I am kind of a hyper guy though. I have been hassled by the cops before to the point I have volunteered for a piss test to prove I was not on meth
Again... same way with me. I got arrested when I was 16 for smoking a joint while driving. Oops. Anyways, the police had us sitting on the curb by the car while they 'interviewed' us. The guy talking to us asked us all the questions about what was going on. Then they grilled us on what kinda gang members we knew (as there was major gang activity during that time). I remember telling him when he was not believing us... "come on sir, you really think a skinny little white boy like me knows any gang members". He stopped after that... but started in on the meth speech.
He's like "Now look son. There's smoking pot and driving and that's not good... but it's not going to ruin your life like this other stuff you are on."
"Sir, I told you before, I've never done any kind of drugs in my life... just smoked pot a few times"
"Look kid, you don't have to lie to me or to yourself. I can tell your high, I've been trained and I've seen it too many times. I am really worried about you."
It went on like this until basically I said "Ok, You're right... I should stop doing whatever it is I'm doing. You are absolutely right sir."
It's like even when the police care they can't get it right. lol