Don’t race unprepared. In discussing the importance of building confidence and mental toughness over the long haul, Wilder discourages athletes from starting a race if for some reason the training has been insufficient. If injury, illness or the pull of life commitments have left you short of the fitness level demanded by the race, don’t do it. “If you don’t have confidence in your ability, go back and work on it. Go back to preparing the way you should.” To do otherwise, Wilder says, can be a form of self-sabotage.