How many people do you cross paths with on any given day? A dozen? Twenty? Fifty? Ever stop to wonder how many of them might have more in common with you than you realize? What about your mail carrier? Your Zumba instructor? Your mechanic? The girl at the cash register of the supermarket? Your waiter? The person behind you in line at the bank? The truth is, we each have contact--however fleeting--with countless people each day about whom we know...