Could you give up alcohol for a month ?
I've given-up booze from the day after Thanksgiving (a.k.a, the 4th Friday in November) till Christmas Eve, the past two years. The first year I did it because we had such a blowout at Thanksgiving that I felt I needed some detox time. The second year I did it ... for the same reason.
How was it? Well, it's boring. It makes parties difficult - and there are always a lot of parties in December. It takes a lot of the fun out of going out to eat - a steak and a Coke just isn't the same as a steak and a Cabernet. But it saves a lot of money! I don't really notice any physical or mental changes; I don't feel better, or smarter, or livelier. I just wake up a bit earlier on weekend mornings. It does lower my tolerance for alcohol tremendously, though; once the month ends, the first beer will give me a serious headrush.
So basically, it's a challenge: a test of willpower and stick-to-it-iveness. Worth it? I dunno.