I like simple principles that people can remember. Too often, we receive advice that is so hopelessly complicated and convoluted that you can't even understand it, never mind live by it. (How many times have you walked out of a meeting confused by what, if anything, was decided?)
Our time is a gift. I worry that we take it for granted. Roughly 73,500 years ago, humans were migrating from Africa towards other parts of our planet. The Sumatera volcano exploded, changing Earth’s climate. All but a few thousand humans perished. Our race nearly ended, due to natural causes. Our time is a gift.