It is hard for me to get in enough at work, as well, since I am in a clinical area. What I do is drink 16 oz of herbal tea as soon as I get up, and I try to get another 16 oz in on my way to work. By the time I get there, it is time to pee off the first mug. I then try to get 16 oz during the day, and then 16 oz again in the evening. By keeping on this schedule, I can get 64 oz in on a work day.