The little things

the alt scene (we write alt text)

Y'all, keep your beautiful selves hydrated! Not only is it good for the skin, it also refills your open cycle evaporative cooling system. Many (mental and physical) health conditions and medications also have an impact on hydration, so keep that in mind.
If plain old water is difficult to drink for any number of very valid reasons, spice it up by adding a little juice or cola or something to your water. Sometimes I mix cola and sparkling water in a 50:50 ratio (roughly, I'm not measuring it exactly) which tastes surprisingly well if I haven't had pure cola immediately before. This gives me better hydration while still tasting like something my ADHD brain likes to drink.
There are many more tricks to, well, trick oneself to drink enough. I'm sure there's one that works for you as well.