You are absolutely right that 4-5 liters of water/day is a lot, and it's really hard to do. Based on an idea from my brother, I get a head start first thing in the morning. I drink a liter in the AM before/during meds (7AM). I then eat (includes .3 liter protein shake), exercise and drink another .5 liter. So by the time lunch rolls around, I'm nearly half of the way home. And then from lunch through dinner, I drink at least another .5 liter. Throughout the day, I sip 1.5-2 liters of homemade lemonade (water, pure lemon juice, stevia). I do my best to slow way down on the fluid intake by 8PM, as I'm not a big fan of a bunch of middle-of-the-night nature calls.

It all sounds pretty straight forward, except is doesn't include that one little life necessity called work. I have not gone back to work yet, but will be doing so shortly. That's when I'm sure I'll be fully challenged to keep it up.