I've started doing this when smoking weed, found I often have interesting or hilarious insights or ideas. Very fun and exciting to try jotting them down in this state! And then reading them when sober is always good
I try to do this, but any time I take enough to have anything decent to write about, I've taken too much for anyone to comprehend what the fuck I'm rambling about.
i do this with my mp3 player..well it's not the same but it's the same idea. when music pops into my head or a cool beat..i try to remember it but i usually forget by the end of the day. so now i keep my mp3 player near me so i can use the built-in mic to record it when it happens : )