Tea, a cup or two a day, milk no sugar. Used to drink more before my surgery. Cut back afterwards, and less is fine. Prefer not having to pee all morning.
Most Americans haven't had any tea. They think they have, but they haven't, because by-in-large, they are making it in a cup with tepid water. All tea tastes very bad made this way. Boiling water, pot. Very simple.
I generally have Typhoo on hand, one of the "golds" (Barry's Gold or Yorkshire Gold), a common blend such as English or Irish Breakfast, and varietal or two (Ceylon, Assam) when I can find them. All loose, no bags -- the best way. I stay away from Twinnings. Expensive, and not very good quality.