I just don't worry about water weight. I mean, I would if I were walking the red carpet at the Oscars or something, but on a day to day basis in my not-very-glamorous life? Nah, it doesn't really bother me if I'm carrying extra fluid as long as I know what's caused it.
If it goes on for a couple of days and makes my rings tight or if I have a special occasion for which I want to look my smallest, I'll generally up my water intake, skip extra-salty stuff, and lay off my free weights for a couple of days beforehand.
Mostly I just ignore it as long as my measurements are still going down overall--and they have been, so it's all good.