What makes you smile? What is it that makes you happy? Think really hard now - is there an incident in your life that made you the happiest you have ever been? Think about it. I'll bet there have been a lot of special times.
Now here's what we can do - this is something every one of us can do. List those special moments in your life and see what they might have in common. Were they special because of someone else? Did someone do something really nice for you. Was it another person's act that brought you that smile?
Now let us recreate those moments, only instead of us smiling - instead of us being the happy ones, let's try to put smiles on the faces of others. Here's the things though: in doing this, I'll bet we'll be smiling just as much as the other person!