It's not your job, your traffic, your boss, the economy or your neighbor that is "causing stress".
It's the thoughts about all that. They are separate things. The external events are one thing, which you can not control. But you can determine the "thinking style", which according to Dr. Mike Evans who produced this video, is not just half the battle, it's 90% of the battle!
Backed up with several studies in the field of psychology, he makes the point that your thoughts and attitudes determine the response to stress, and have the power to maximize or minimize it's harmful effects.