Tips to stop myself from drinking?

I have struggled with alcohol dependency before and I still drink regularly however I don't drink in response to the way I am feeling anymore, and do not keep alcohol in the house to deter myself from going backwards . . . My friends were round last night and they have left rather a large amount of alcohol round mine and I've had a really bad day and it is taking all my willpower not to drink :S Anyone got any tips on how to stop myself from drinking? I am really right at the end of my tether atm . . .