"Pay it Forward" is one of my favorite movies! I try to do at least one random act of kindness each day.Sometimes, it is as simple as holding a door for a person with their hands full or returning a cart in the parking for someone along with my own.
I have rewired my brain to look for little opportunities.
Another little fun thing to do is just smile at everyone you see for one day! It is interesting to see the reactions of others. This made an interesting college paper.
Go rent this movie....You won't regret it!