It may seem like an easy thing to drink more water in a day. I mean, what's so hard about it, right? You fill up a glass, and you drink. But for some reason, the day goes by, and you realize by the end of it you may have had two glasses. Ack! How did that happen again?!?
For a lot of people drinking water isn't a habit, meaning it's something you have to consciously think of doing. Why though, would you want to add something else to your busy day?