If you want to accomplish your goals they must be more than just measurable they must also be Attainable.
No one can be the star volleyball player on the team, a straight student, play in the band, student body president while working two jobs after school.
Even though you can measure how long it will take to accomplish all those goals, they are not sensible or attainable because nobody has that much time of day or energy to accomplish all those things.
So, your goals must be realistically attainable otherwise you will burn out and not accomplish anything!