In psychology, procrastination refers to the act of replacing high-priority actions with tasks of low-priority, and thus putting off important tasks to a later time. Psychologists often cite such behavior as a mechanism for coping with the anxiety associated with starting or completing any task or decision. http://en.wikipedia.org/wiki/Procrastination
Everyone procrastinates. We put things off because we don't want to do them, or because we have too many other things on our plates. Putting things off—big or small—is part of being human. You suspect that you could be a much better writer if only you didn't put off writing projects until the last minute. You find that just when you have really gotten going on a paper, it's time to turn it in; so, you never really have time to revise or proofread carefully. You love the rush of adrenalin you get when you finish a paper ten minutes before it's due, but you (and your body) are getting tired of pulling all-nighters. You feel okay about procrastinating while in college, but you worry that this habit will follow you into your working life.