What you should do sometime in your life:
Get grass stains on your knees.
Grow your own food.
Learn to swim.
Learn to ride a bike.
Learn to fly.
Hear a joke that makes you laugh so hard you cry.
Tell a joke that makes somebody laugh really loud.
Believe in a mystery.
Solve a riddle.
Fall in love.
Lose a pet.
Defend someone who is unpopular.
Smell the rain coming from a mile away.
Smell a rose.
Write a list of wistful things. (Such as this one.)