Your are your 'selfish' years. It's a decade to immerse yourself in every single thing possible. Be selfish with your time and all the aspects of you. Tinker with shit, travel, explore, love a lot, love a little and never touch the ground.
Great use of 7 habits of Happy kids. Instead of working on multiple behaviors allat once which can be challenging with the younger ones, I like the idea of sticking with one specific behavior goal for the entire week until it's changed.