Two recent studies have put my beverage habits on the high ground. First we had the news that daily caffeine intake reduces the risk of Alzheimer's. Then the word comes that the rule about drinking eight glasses of water a day is pure bunk.
If caffeine helps you stay mentally sharp, I think I drink enough coffee to add about 10 IQ points. And when I'm not drinking coffee I'm usually drinking iced tea. Water is fine in a pinch or if you're really thirsty, but I had despaired of ever drinking eight glasses a day.