DR TCB, how are you feeling today?
I've been to store and returned with vodka. I got about halfway through the Disc 3 songs in seven hours and figured, the hell with it. I'm tired.
I thought you were going to say I got about halfway through the bottle. Drinking alone is the first sign 
I hate to disappint my critics but i'm no drunk. Yet.
I don't like drinking alone, but a glass of vodka and tonic iisn't bad for sleeping before turning out the lights.
Alcohol can help one get to sleep, however, it is often the cause of waking up during the night.
I still remember the whole "Is alcohol a stimulant or depressant?" discussion from my high school's driver's ed/alcohol awareness class. It is a technically a depressant, but the initial "reaction" can be sort of like a stimulant. And, as DR Jane, mentioned, it can cause you to wake up during the night which is caused once the alcohol has metabolized in your body.
I'm also one of those people who can get quite drowsy when I drink alcohol - especially wine. It doesn't happen all the time, but when it does...
I still remember one time at Becco when I happened to catch the eye of my waiter at Becco just as I was nodding off at the table - or rather his eye caught mine as my head nodded down. A few seconds later he appeared with a freshly-brewed cup of coffee.* -That was after a negroni and a couple of glasses with wine. Needless to say, we skipped the post-dessert grappa that night. Or did I nod off during the grappa? In any case...

*Tim, our waiter, got a very good tip that night.