Your drive and energy towards a goal is in direct accordance with your enthusiasm and desire for the outcome. If you feel your energy waning, if you start making excuses to not complete your tasks, it may be time to reevaluate your goals. It really helps to review your goals daily. It also really helps to spend time envisioning the outcome. A vision board can be a very useful tool to remind you what you are working so hard towards. Don't be hard on yourself if you happen to change your mind about what you want. Remember, every day we are changing and evolving. Who we were yesterday may have wanted something different than the person we are today. This is not unusual. Go with the flow. Don't be afraid to follow your dreams.