Some people tweeting or texting will even shorten it to RAK. As in " I just received/gave a RAK".
Thing is, if you just live your life dishing out random acts of kindness without thinking about the fact you are doing a random act of kindness than you will feel more of the benefits of being a random of act of kindnesser.
If you keep hoping and waiting for a random act of kindness to happen to you then you will never get one. Or you will, but you won't notice it.
You won't notice the driver who let you in, the person who held the door for you, the person who paid you a compliment, the hairdresser who got you a cup of tea, the friend who bought you a coffee, or just invited you over to her house to make you one. You won't realise it when a friend calls just to say hello or you get a card in the mail. But these are all everyday moments of kindness that make up a good life - for the giver and the receiver.
Don't think about it.
Just be Kind. All the time. And then a little more.