BJ’s book is one of the most practical books I have read. I found the below exercise in his book particularly useful.
1) Write down what irritates you (you can make the list as long as you’d like)
Example List: Honking, a loud engine (car + motorcycle), when people pop their gum
2) Pick one thing from the list that happens frequently
3) Every time it happens, use it as an opportunity to celebrate
Example: Every time I hear someone honk I will yell, wahoo!
Wishing you success in implementing this short and sweet habit!