[silicon2401]

Take any reason to drink more water. Drinking more water is one of the best changes I've made for my health. Now I can feel the difference when I don't drink enough: headaches, tiredness, perceived hunger, etc. Most of us live in a place where drinking water is essentially free and infinite, and it's so important to take advantage of that.

[passivate]

Not sure how if you've found the same for yourself, but for me, my body adapts quickly to certain items that I consume - such that any deviation from the schedule and I get minor/mild discomfort.

e.g. Switching up meal timings after eating consistently for a while, or stopping my morning coffee, or a sudden reduction in water intake, etc.

I think what works best (for me) is to have a varied approach where you don't stick to one schedule/program.

[silicon2401]

I don't know that I feel a bodily difference, just annoyance. My approach is discipline and putting in effort to make sure I keep up with routines that I've noticed have a positive impact on me

[pydry]

I noticed that on the days when I "overdrink" water I have much better focus than on the days when I just drink enough.

I used to attribute my ability to focus clearly when flying to the lack of distractions but I think a large part is also the unfinished water bottles I inadvertently end up drinking before going through security.