I love this:

And that's when it hit me: A stranger had paid my toll for me.

And what's more, he or she had done it for no good reason. Or rather, she or he did it for no other reason than to, as the phrase goes, "pay it forward."

I couldn't wipe the grin off my face. Once the reality set in — that I'd been the target of a random act of kindness — I could not stop smiling. I felt so happy. So grateful. I felt blessed. I felt as if I were part of a community. A secret community of kind people. I'd been selected. I'd been inducted.

This is a neat idea:

There have been long-stretches of pay-it-forward — like one in August when someone started an 11-hour-long chain of buying a drink for the car behind them at a Florida Starbucks drive-thru. The first act of kindness was random, though the others were inspired by the first.