Start each morning with a smile in front of the mirror - smile even when the day looks challenging, because your smile can change the course of your day and that of those around you.

Throughout the day, when you meet people - friends, family, or strangers - give them a genuine and warm smile that comes from the heart, always, and see how it brightens their day.

Every evening, before going to sleep, think of three things that made you smile today and write them down.