Having a “water counter” on my computer really helps. After I found out how much water I need a day I installed a programm and now every time I start my work computer a bottle pops up. Every time I drink a glass I add it to the bottle. It’s actually rather fun.
I’m up to two litres a day. Which is the amount I need.
I do need to devide more. A glass an hour works better than five glasses in the 2 odd hours before I go to bed. If I do that I have to pee every five minutes ;)

