Depends on which of the above roughly identifies you as to what kind of action you should take to quit or moderate your drinking.
Any of problem or habitual . Find other ways to unwind, seek outside help for sure, but what you'll probably find is that you'll quit or moderate with relative ease, life will improve, you'll feel better and in a month or two, you'll wonder why you ever used to think booze was so great.
Heavy drinker, as above but it will take a bigger effort, more outside help and may take 6 months to a year to really get comfortable with not drinking but eventually you'll pull through and be very happy you did.
I won't bother describing the process for a full blown alcoholic. But ask if you'd really like to know.