You become what you focus on most of the time
Whatever you focus on is who you will become and the results and outcomes you will receive.
What you focus on really determines your reality, because whatever you focus on takes up most of your conscious power and according to the Law of Attraction you will constantly attrackt that into your life. Therefore it is vital that you the discipline and the will to constantly think and focus on what you want in life, instead of what you don't want. The best way to do this is to follow your purpose, define and create your vision for your life and to set your goals, and the action plan for it's realization.