I believe that goals can be achieved without any excuses. As an educator and athlete, I teach children to strive for the best and friends how to go beyond their body's physical potential. If a student was undecided to enroll an advanced placement as opposed to a remedial course, I would advise them to do the upper. In addition, if a friend were to ask me to complete a 5k run or a full marathon, I would choose the latter.
The mind and body are terrible objects to waste. Procrastination should not be in a person's vocabulary and lifestyle. After all, we only get to live once. So utilize them, no pun intended.