I just read a book called "Your body's many cries for water" and the author advocates something similar: a glass of water half an hour before each meal. Apparently, it takes a LOT of water to digest food, and many people are chronically dehydrated. Drinking an extra glass of water half an hour before you eat gives your body time to put the water where it's going to be needed... or something like that. It's supposed to make all the chemical reactions of digestion work better when there's plenty of water available, as well as boost your daily water intake.
height- 5' 5"