Sometimes we can be so determined to move forward on our path's that we get tunnel vision. It helps to stop once in awhile and look up. Have you ever been told when going through difficult times that "things will look up?"
Maybe there is a good reason for this. When we physically move our head's to look up, could we also be changing the brain's chemistry and lifting our moods? Try it some time and let me know what you see and how you feel.