I usually get 6 - 8 cups in. I didn't have this habit til a few years ago...and I read that many people are more dehydrated than they realize!

I think a person is supposed to have 2 cups of water for every cup of coffee? I drink swiss water decaf, so don't know what difference it makes.

When I had a slight headache and all the day after my surgery last year, the nurse had me up my water intake (she added diet Ginger Ale at my request! LOL). That flushed out the morphing and anesthetic, and I felt better! Water's a great cleanser!