Maybe you have a trust fund. Maybe you'll have a wealthy spouse. But you never know when either one might run out. Don't mess too much with your hair, or by the time you're 40 it will look 85. Be careful whose advice you buy, but be patient with those who supply it.
Advice is a form of nostalgia.
Dispensing it is a way of fishing the past from the disposal, wiping it off, painting over the ugly parts, and recycling it for more than it's worth. But trust me on the sunscreen. Of course, people outside the Continental U.S. would have a difficult time following this particular tip. Feel free to email them to me. Flames and trolls will be ridiculed or ignored, depending on what mood I'm in.