Single-Malt Scotch or, preferably, Maker's Mark bourbon, before, during, and after fishing.
Oh, first thing in the morning, Starbuck's bold-blend coffee. Frequently, this is spiced up with the aforementioned.
A plug of tobacco, a couple of cigars, my pipe, and I'm good to go.
If I'm really thirsty, then I'll resort to a few beers...usually lagers or ales...then back to my beloved whisky.
Water, Gatorade? That stuff will kill you!