I drink about 1/3 - 1/2 gallon of coffee a day.
I try to fit in another 30oz of water lightly flavored with a pack of sugar free propel electrolytes
then another 24-36oz of beer if possible. otherwise a couple ounces of liquor mixed into whatever drinks are handy. or just water, vodka, and lemon juice... you know, to make sure i get enough fluids in my diet.