you could try the lipton (if you like tea) or crystal light packets added to your water if you absolutely can not drink plain water. You should be drinking close to a gallon a day. I literally carry around a gallon jug to be sure Im getting enough.
The best thing I can think of to "force" yourself is to remind yourself its not negotiable, your baby needs you to drink water, going all day without hardly drinking anything is not a good idea.
Best of luck!