Without wonder, life is merely existence. Sit in the dark. It will teach you to see and hear, taste and smell. Once in a while, turn down the lights, the volume, the throttle, the invitations. Less really can be more.
Nothing is usually the hardest thing to do - but often it is the best.
Take a walk-but don't go anywhere. If you walk just to get somewhere, you sacrifice the walking. Count your friends. If you have one, you are lucky. If you have more, you are blessed.