I'm in my 40's, and have only really started my CD'ing journey. I'm noticing, with all the hair removal that I am doing, that my skin has seen better days. Lots of sun induced freckles, lines, and other marks.
So, don't try to be tough guys (when you are in guy mode) and run around with your shirt off while working or playing outside. Avoid tanning, no matter how good you may look. Wear sunscreen. Wear a hat. Protect your skin. Use moisturizer. Wear proper winter clothing. I could go on, I'm sure.
Oh, and don't try to be tough when it comes to work - lift reasonable amounts. Don't be heroes. Get help if something is crazy heavy. Your body will thank you for years to come.
Take care
Jay Cee