Don't go into debt. Track every penny earned and every penny spent. Spend money on healthful food. Use money to buy more free time to spend doing what you love. Integrity is always more valuable than money. Be unconditionally generous. Don't give to charities because you think you should. Making your own living, paying your own taxes, and tending your own house does more to save the world than you realize.
Learn how to cook from staples. Eat mostly plants, for your health and for that of the planet. Try one new recipe each week to learn a new technique. Have a friend over for dinner.
Make something every day. Be kind but don't compromise your values. Ask for forgiveness, not for permission. Charge what you're worth. Be generous with your time.
A few deep friendships are better than a hundred shallow ones. Tell someone you love them today, and feel it as you say it. Practice gratitude every day.
If you're gonna own a car, make it the smallest you can buy. Ride your bicycle. Be thankful for your body, whatever its shape. Don't count your steps or calories. Do lead an active life.