Personally, I like having a pre-game at the house with beer and liquor I buy from discount liquor stores. This is great because you get more one-on-one time with your friends while also having the option of going out later. Also, I only carry cash when I go out. When the cash is gone, I know I'm ready to go home. This was mainly because I would forget my credit card when going out, and it's the worst feeling in the world knowing you don't know where your credit card is.