[komlenic]

The implication in my comment is that you do want to do the thing (or that there is some expectation, either personal or external, that you have to do it ex: studying for a course that you need to graduate).

Wanting to do something, or realizing you need to do it does not remove your personal barriers that lead to procrastination: maybe it seems too difficult, you don't know where to start, you're afraid of failure, or maybe you're suffering analysis/paralysis. You're still "motivated" in the "I want/expect to do this thing" sense, but you lack the motivation in the "wow I can do this, get to work" sense that you need to push through and get moving.

This is where "motivation follows action": you start small, identify some easy steps that will begin moving you towards the goal, and do them -- and through this action, motivation often follows.