There are people who have only one task but cannot motivate themselvs.
I asked them whether the task is to finish within 4 hours. 58% of them answered "no." The task is too large, in other words, the goal is too far. We need to make the goal closer to keep the motivation.
Moreover, 75% of those who answer "no" do not understand how long the task takes. (*17)
They feel as if the task is big because they did not estimate the size of the task. The feeling decreases motivation.