Focusing your efforts and doing the work isn't easy. You have to create time within your busy schedule to pursue something that will challenge you mentally, emotionally, and maybe even physically. 

You already spend so much of your energy working for a paycheck. In comparison, setting and achieving your own goals is a small investment in your future with a far greater return than any typical job could give you.

Getting things done also improves your personal life because happiness is the result of realizing what you're capable of and overcoming the limiting beliefs you have about yourself.