How much water?

The standard is 8 glasses of water (I'm not sure if this is 8 oz or 12 oz). I drink somewhere between 3 and 3.5 times that everyday. If your urine is yellower/darker, it means you aren't getting enough water. The clearer it is, the more hydrated you are. It's incredibly difficult to "overdose" on water if your organs are functioning correctly. I say just drink as much as you can.