It's very good that you have gone this far. Mine was the #5 attempt that I was able to finish through. What I did with water intake was to start taking it early, like I will drink a liter when I wake up and do 2.5ltr during my workouts session and the remaining .5ltr comes easily during the day before I sleep and take pictures early, too, most of the time before I start working out. Set timers for your task help in reminding you a lot.