It sounds so simple, and it is. All it takes is a minor adjustment in attitude to bring so much reward ... smile, look on the bright side, be thankful, greet strangers, let a car or two ahead of you in traffic. There may be days when positive things are harder to find, but it's worth your effort to look for whatever slight glimmer of something in the chaos to be thankful for.
"We can complain because rose bushes have thorns, or rejoice because thorn bushes have roses."
-Abraham Lincoln
I choose to rejoice.