19. Sunscreen is your friend – Use it

Beautiful sunlight. Oh, to be enjoyed. Yet photon by photon they hit your skin and quietly accelerate the aging process. After a few years, unless you are a rapid protector, you have sun damaged skin, or worse. The social consequences of disproportionately aged skin depend on so many things but in general it is not desired.

One of the more serious consequences is the development of skin cancers ranging from mild to deadly and you do not get to choose. Block those pesky photons: hats, clothing, dark spaces, and sunscreen. Always make it part of your going outdoors, kind of like clothing.