Tomorrow, June 7, IS MY SURGERY DATE how much water??

Yes tomorrow is my big day and I am a nervous wreck....I was just reading over the first two weeks of ONLY liguids...My question is do we still drink all tha****er 1/2 hour before or after THE LIGUID meals??? Or does the liguid take the place of the water? I am a bit confused on this. Thanks for any help or support you can give me. Phyllis C.