Also, don't drink carbonated water if you are watching your sodium intake as it contains sodium. If you don't like to drink water try flavoring your own water with a squeezed lemon, orange or lime or just add a little fruit juice to your water. We really need to drink plenty of water. Water is involved in every single body process, including digestion, absorption, circulation and elimination. With too little water these processes are very inefficient.
Water helps to regulate all the body processes and body temperature.
Always drink plenty of water both before and after exercising. That bit of info is from Bob Greene too.