I agree with killa - don't drink. It seems like the easiest way to dull the pain, but you will invariably end up drunk dialing or texting which will just drag the thing out longer. Nothing good will come from you trying to make contact and talk things out with her at this stage.
You need to get busy. Hobbies, socialising, reading, watching movies - anything to keep you from dwelling on your ex. I still think of mine every day after nine months, although it doesn't hurt that much anymore. It really does get easier. The only thing that really stops you thinking about an ex is a new romance.