I've bought recently one of those cheap wrist bands. One of the most important features for me was ability to measure sleep quality in terms of "daily hours of deep sleep," whatever that scientifically means. Over the course of several months, I've been able to identify things which affect my sleep quality: * eating late: bad * drinking late: one beer... not really that bad * answering work emails until midnight: REA…
Also getting enough sun or vitamin d helps. Trying to burn off as much energy before my mind has a chance to race before the end of the evening.