Water tricks:
Invest in a Brita or buy large containers of bottled water! Trust me, it's worth it.
Fill up a half liter sized bottle. You only need to drink this twice to get to your minimum. Try to set a goal to finish the first one about halfway through the day and the other by the end of the day.

Good luck guys! I'm so lucky, I'm a GUZZLER of this stuff. The office water cooler and carrying around water bottles really helps.