What Devlyn said. Pint glasses are the fastest way to gulp down liquids, I slam one down after waking, before/after meals, and throughout the day. I'll coat about 70% of the bottom with salt for the first few pints, to get my request salt intake, and otherwise just eat my usual simple diet; other girls wolf down crazy things like Cajun spice okra tips coated with rosemary and basil to deal with salt cravings, but I just add a pinch of the stuff here and there.
If your legs cramp up when you wake up you're low on salt, I haven't had that problem in months, after 5 months of HRT. I'm on a low dose of spiro and moderate dose of estradiol. The water's essential, when starting out I became dehydrated without feeling thirsty, which made it feel like my blood had turned to jello. Being a stranger to exercise I didn't know anything about dehydration, my idea of working out is to slam the car door.