8. Don’t dye your hair too much
While it can be fun to dye your hair often in dramatically different shades, it’s also a great way to wreck your hair. Not only will you be delivering bottle-loads of chemicals to your scalp, you’ll be stripping away your hair’s natural color and drying it out to the point of straw. While professionals carry some gentle product lines, it’s still a good idea to wait to dye your hair until you start getting gray. Since many teens are apt to ignore that good advice, they should at least keep dye jobs to a minimum or use safer products like hair chalk.