15 Ways Of Making Someone Smile.

1. Hold the elevator door for someone instead of rushing to get to your floor faster.

2. Say "hello" to a stranger as you pass them on the street.

3. Treat the person behind you at the coffee shop to whatever they were planning to order.

4. Give your server a generous tip.

5. Offer up your seat in a crowded place.

6. Call an old friend out of the blue.

7. Compliment a co-worker or friend on how well they pulled off a project they've been working hard on .

8. Text someone you love a completely random but hilarious emoji.

9. Reminisce about one of your favorite memories.

10. After a fitness class, offer to return your gym buddy's mat, weights, or BOSU ball to its rightful place.

11. Text or e-mail a friend a throw-back photo of the two of you.

12. Do one of these 17 small gestures that say "I love you" for your significant other.

13. ...or actually say "I love you."

14. Really laugh out loud. 

15. Smile at someone. 

Source: http://www.womenshealthmag.com/life/how-to-make-people-smile