Here's an article that might give you some ideas: www.sparkpeople.com/resource/nutrition_art
There are tips in there, plus links at the bottom for more information too. What works for me is having a two-cup glass, and drinking one of those before work (usually not a problem as I do morning cardio). I have the same glass at work, and fill it three times while I'm there. If I don't have it drank before morning coffee, I drink it instead of coffee. Fill it up and drink it again before afternoon coffee break. Fill it one more time and drink it before I leave.
I often have more at home after that, but I know for sure I get in 8cups by five o'clock.