Pay it forward

When someone does a good deed for you or something of that sort, you tend to say "I owe you one" or "I'll pay you back." How about we pay it forward? Do a random act of kindness for someone else? Help three people and ask each of them not to pay it back but pay it forward. They help three or more people. And so on. It's an exponential growth of kindness and good deeds. One good turn deserves another, so pay it forward.