I think there is a direct relationship between motivation, measurement and achievement.
One of my favourite quotes, and I am sorry that I don't know who originally coined it is:
"What doesn't get measured, doesn't get done."
If you set a goal, then measure your progress everyday, it let's you make changes for the next day. A chance to produce a different outcome.
If you don't take measurements of the results you have produced how can you know what to try next? I guess that, and you need to have the skills to analyze outcomes.