If you are tired, this can be a bit of a challenge to your motivation, but there are several ways to help you boost your spirits. 

Set concrete goals. Clear and attainable goals give a sense of purpose and direction. Make sure that the set goals are realizable and bound to a timeline.

Instead of working on a large task all at once, break the big problem into small, easy tasks. The task will look less overwhelming, and it becomes possible to start.

Reward yourself! Do you have a favorite treat? 

Change your environment once in a while. Work in a different room, take a walk, or simply reconfigure your workspace.

Stay hydrated. The fuel you put into your system is directly related to the energy you produce. Be sure to drink plenty of water!

Take small breaks to avoid burnout. Periodic breaks may be applied using techniques like the Pomodoro method, in which one works for short periods and then takes a break.

Imagine yourself accomplishing this task. Visualization can give you that boost of motivation to help keep you focused on your goal.

Get moving! Any form of exercise can offer you some energy and enhance your mood. As little as it may seem, even small doses of exercise will do.

Talking or texting with a friend can sometimes get one going again. By sharing your goals and progress, you may feel more inclined to be accountable.

Most of all, don't be hard on yourself. We all need to regroup sometimes.