Chad, you're going to do great!

I often make 5 burgers on a sunday night, and then wrap them up individually to take to work as a lunch or snack. Also of course works with chicken breasts. Then just eat however you like (I tend to like lots of mayo and some mustard). That takes care of the not being able to go out to eat thing - along with maybe some cheese slices or bacon for crunch.

Sounds like you've got the water thing taken care of, but you could also buy those 32 oz. plastic bottles of selzter at the store and bring those in to work each day. Two of those and you've done the minimum water for the day (and of course you'll have more with dinner).

Wishing you great success!
kiwi