How can we overcome procrastination?

What I like about time management is that the subject is essentially about SELF MANAGEMENT. We all have the same amount of hours in the day, yet even when two people are using the same time management tools, one is often more productive in the long term than the other. Why is this?

One important factor is related to procrastination. Procrastination is the behaviour of putting off tasks that you know you need to do.