In our society, we enjoy being done with things; while we do them, we strain to jump into the future. We do not enjoy being where we are.
We try to will the green light not to turn. We will ourselves through the intersection before we are there.
We don't enjoy doing things, we enjoy being done with things.
If we can enjoy what we are doing now, most of our stress will vanish. Our eyesight, digestion and sense of humor will return to normal.