Yeah, it is hard to drink extra water on top of other beverages like coffee. Which is one reason it can be a good idea to give up coffee and tea and wine and soda pop altogether -- when you have nothing to drink but water, it's a LOT easier to get in the requisite amount of water. I never used to drink anything but diet Coke & coffee. Now that I quit everything but water, I find it easy to drink a gallon of water every day. And my skin is looking better -- no bags under the eyes in the morning, more of a glow, etc. But yeah, giving up coffee can be almost impossible -- when I did it, I was wondering if heroin withdrawal could possibly be worse.