To your health!
If you drink other liquids, you can get by with less water. (Low-fat or non-fat milk is a good choice, with the added bonus of a boost to your calcium.)
If you are concerned about overloading your bladder, drink most of your water (or other fluids) in the morning and early afternoon.
Be aware, however, that for some health problems, such as heart failure and kidney disease, you may need to limit how much water and other fluid you drink. Check with your doctor before increasing your fluid intake.