Time management and motivation go hand in hand. Without a time management contingency in place, it can be hard to stay motivated, and without motivation, it's difficult to stick to any plan that you have.

The best way to ensure that both time management and motivation are working together is to list each day the tasks that need to be done.
Depending on the best way for you, either at the end of the day, or the beginning of the new day, write out a list of the tasks that need to be completed.

If possible, break the tasks down into smaller jobs. Having a physical list not only allows you to see exactly how much work you have to do, you should also be able to get a rough estimate of the amount of time each task will take.