Every runner experiences doubts about his or her ability to achieve race goals. The runners who most often achieve their goals are those who muster the confidence to shout down these natural voices of doubt. Your training diary can be a great source of confidence. It is a rich record of how much hard work you’ve accomplished and how much progress you’ve made. It is the nearest thing you have to proof that you can achieve your goals before you actually achieve them. Whenever you hear those voices of doubt within you, pick up your training diary and remind yourself of how much cause you have to believe that you will achieve your goals.