Have you heard of the 21-day Complaint-Free Challenge? This is where you try to last a full 21 days without making a single complaint, criticism, or unfair judgement about someone or something. You keep track of your progress by switching a purple complaint-free band from one wrist to the other each time you complain.
I recently told a few friends about the exciting new scientific research that shows just how contagious smiling can be. They decided to test it out by just randomly smiling at people. One of my friends told me about her shopping trip to ASDA and how, after a few curious looks, some people smiled back. It even led to a conversation with an elderly gentlemen and also a pleasant exchange at the till point.