Pot gets a really bad reputation for what it does. Just don't eat it in a cake, m'kay? Because I made a cake a few months ago and er, put far too much in it resulting in everyone who ate it getting absolutely wasted.
Smoking blunts or in a pipe is fine and gets you stoned in a good way.
Mushrooms sound tempting as does acid, but I'd probably do neither because I hate normal mushrooms with a passion and I wouldn't like to hallicinate and I think doing acid would **** my brain up, plus it's one of those things that effects you forever more - the boyfriend has done it once or twice and as a result he notices patterns easily and finds it very difficult to unfix his gaze from them.
Back to pot - it doesn't give you a stinking hangover if you overindulge.