One thing that can affect my productivity and creativity is my energy level after exercise and varying levels of sleep (I have a 2 yr old!).
Tech is helping me track the exercise half of the equation. My Polar M400 watch shows me when I should and should not go to the gym or play squash because I am either undertrained, or strained from too much exertion. If I am fit, then I can be more productive. I have normally found heart rate monitors a bit of a gimmick, but lately it is really helping me to keep track of my body. Highly recommended for creatives who also enjoy keeping fit.
All I need is for my 2 year old to play ball on the sleep side of things….hmm.