To start off  why not keep it light, and have a bit of fun. What better way than to make people smile?  This in fact does change the whole chemistry in our brains.  We can create an impact on our lives as well as the people around us with this simple technique. 

“So what is going on in our brains when we smile? Imagine we are in a pleasant situation, like bumping into an old friend on the metro. When our brains feel happy, endorphins are produced and neuronal signals are transmitted to your facial muscles to trigger a smile. This is the start of the positive feedback loop of happiness. When our smiling muscles contract, they fire a signal back to the brain, stimulating our reward system, and further increasing our level of happy hormones, or endorphins. In short, when our brain feels happy, we smile; when we smile, our brain feels happier.

Fake it till you make it! Yes, if you want to be happy, just smile. Thanks to the positive feedback loop of smiling, we can alter our brain's emotional processing pathway to feel happier with a simple smile.” What's the science behind a smile? By Ding Li 

Smile, it is the key that fits the lock of everybody’s heart.  Anthony J D’ Angelo