My friend gave me a couple "special" brownies that she said are extremely potent. Since I have never tried an edible before, I am only eating 1/4 of the brownie to start off. I don't want to be comatose, so I'd rather start small. Does anyone else have a lot of experience with edibles? I'm not even sure how to store these brownies, or how long I can keep them. Any advice? Thanks!