When I was in college I preferred to smoke over drink
I've done it before in my college days but now I rarely smoke anymore. It's a little too relaxing where I don't feel productive being that high for that long can be a burden travelling. You need to have awareness when you're going out. Tried space muffins from my favorite smoke shop in Amsterdam called The Dolphins. http://www.coffeeshop.freeuk.com/Dolphin.html. There is a black cat that would sit around me and my friends as we got stoned in the stores front window. Very peaceful.
Have emergency rations for food so you don't waste too much time going on ridiculous adventures for food. Unless you're into that but those trips make me paranoid.