To be the best you can at running a marathon, you need to start by making sure you’re running with proper form. When you have your technique down, you can start thinking about training for the marathon, including the important concept of alternating your pace during workouts. As race day draws near, you’ll want to practice tapering — a reduction in your training to help you recover and stay fresh. And when marathon morning arrives, make sure you remember everything by marking off items on your checklist.