20 things to live by. Love this! You don't have to listen to how other people want you to live your life. Live it your way. Do your things. Make your own mistakes. Live life for YOU while you still can.
Keeping a journal is an awesome way to develop your character. It will help you see areas of your life that you need to work on and the great thing about a journal is that you can go back and see how far you've come!
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.