What I do (assuming I am at home all day) is a cycle of this:

• before going to bed, put a fresh full glass of water beside my bed
• after waking up, first thing I do is drink from it
• most likely I will now need to pee, so do that, and after washing hands, immediately refill my glass
• drink from that glass of water throughout the day when I am even slightly thirsty
• usually when I have finished a glass of water, I need to pee again; if that happens, again refill my glass after doing so
• if I’ve finished a glass of water but do not need to pee, I usually refill it with another drink (e.g. fruit juice) instead
• keep that cycle of refilling after using the toilet going

If I’m spending my day at the office, the first thing I do after arriving is grab a glass of water, but otherwise, same cycle.