My husband treats back and neck pain for people of a variety of ages and job sectors. He always explains that humans were not designed to sit at desks.
So years ago while writing my dissertation, I always me made sure to keep 2 big glasses of water at my desk. This kept me hydrated and forced me to get up away from my work for bathroom breaks.
I also made it a point to do neck rotations before getting back to work To this day (I earned my doctorate five years ago this week), I am always in the middle of a big glass/bottle of water.
I am so glad that you see staying hydrated as an essential part of FLYing!