I don't mean to be the buzzkill in this thread but having colleagues who have had problems with alcohol I feel obligated:
Drinking is fun. We (mostly) all enjoy it.
Drinking is an escape. Bad test, horrible day, life change? A drink makes it more palatable.
Drinking is a reward. Birthday, paper published, baby, wedding? Have a drink, enjoy!
Drinking is also a bad thing. Some people can't control it. Sure, alcoholics are the smelly people you see on the street. Just have a drink or two when you get home from work. It's quite nice. Have a drink post-call. It helps you sleep. Can't sleep after work? Have a glass of wine. A glass won't cut it? Maybe two. Welp, there goes the bottle. Friends out after work? Let's have some drinks. I'm drinking more than they are, maybe they won't notice, who cares. Ugh, at home. Still not asleep. I'll have a night cap. Wake up hung over? I'll tough it out. Trashed on the weekends/days off. Eye opener to get me out of bed.
Guys, if you think you're having a problem, ask for help early. You don't need AA. You don't need to stop drinking. Just don't let it get a hold of you. I've seen too much talent wasted because of this.