I think this is interesting reading as a Manager and as a friend & family member. But here is the bottom line if you don't wish to wade through the article;
"...procrastinators tend to be people who have, for whatever reason, developed to perceive an unusually strong association between their performance and their value as a person. This makes failure or criticism disproportionately painful, which leads naturally to hesitancy when it comes to the prospect of doing anything that reflects their ability - which is pretty much everything."
Procrastination Is Not Laziness, By David Cain