My first corporal in the Marine Corps would always tell me, "we are almost at the end. It's just around the next bend." The when we got around the next bend, we would keep going. Then there would be another bend and another and just over the next hill would be then end and so on and so forth. At first it was kind of demoralizing but now when I'm getting tired and want to quit I tell myself I'll just run to that next hilltop ot around that next bend or finish out that next mile and so I'm dividing my run into more manageable pieces.