I am going to post links several of the things that were used in my book, Lucky Change, by Karen Donaldson as she went about her life doing acts of service. One of my favorites is the Smile on a Stick.
Wonderful for those times when you just can't smile on your own. Keep one handy in the car. It fends off road rage and is an instant apology when you do something stupid.
You can order them here: