Smiles are contagious. Smile at someone and they may return the favor to you as well as the next person they meet. If you are feeling down try smiling at someone. Even if you didn’t feel good inside before the act of appearing happy on the outside has a way of lifting your spirits and making you feel better. You will have also brightened up someone else’s day.
For several years I’ve signed my signature with a smiley face. It’s even on the signature for my driver’s license. If a cashier comments on my unique signature I show them my license. It usually generates a smile. You’ll make the world a happier place by spreading joy.