Think with the end goal in mind

Have you ever tried visualizing? When you do a task, it causes you to be slightly mentally drained each time. Have you ever done a lot of homework at once and just felt drained of energy? That’s what I mean. Every time we do a task, we use willpower. The thing about visualizing with the end in mind is that it gives you a clear picture of what the goal is and if you visualize it makes you use your willpower more effectively. If you visualize with the end in mind celebrating at the end of the task will give you even more motivation to complete the task to get the reward(celebrating). 

Great books on this topic are the below