A great story about connection here:

Why You Should Smile at Strangers by Stephanie Pappas

People who have been acknowledged by a stranger feel more connected to others immediately after the experience than people who have been deliberately ignored, according to study reported here today (May 24) at the annual meeting of the Society for the Study of Motivation.

This is the basic premise behind waving to someone…. Acknowledgement.  It’s simple, doesn’t take too long, and gives.