So this is a bit off topic and might get a bit hippy dippy. But dude, i got into straight meditation back when i was smoking alot. It's hard to really "free you'r mind" but id get high, sit and just breath. No thoughts. No nothing. Literally clear your mind of everything. It was crazy. Id finish up and feel so energized and ready for the day. I stopped drinking and coffe or caffeine when i was doing this. Now that i don't smoke, i can't clear my mind like that haha. But yeah as hippy dippy as it sounds, it's a pretty cool experience. If trying it interests you, i totally suggest it.