AA certainly helped many of us here take the first steps. If you search the web for AA near your location you should find a 24hr phone number which is staffed with real people who are very helpfull as well.
In my experience It is real important to keep you Doctor involved with your decision to stop drinking. Be honest with how much you are drinking and find out if perhaps you may require a medically supervised detox. Your Doctor can refer you to right people.
Your work or school probably also has support programs that you can be refered to for alchohol dependancy treatment.