Smile Power Day Give everyone you see a big, friendly, "I like you" smile. You never know, you're warm smile just might turn someone's day right around...for the good! Love may make the world go round. But, a smile makes the world a happy place. A smile is a powerful thing. Best of all, it's contagious. However, we do note that in order to be effective, a smile must be sincere. People can see right through phony or forced smiles. Spend the whole day with a big, bright smile on your face.