Procrastination is like an acquaintance - this might be someone you know from work or school. Like Procrastination, this person is not your best friend or someone you truly hate. You could probably sit around and have a beer or go to the arcade and have a decent time with Procrastination. If you examine the situation closer, although it was alright "hangin" with the Big P (Procrastination), you realize that your time could have been better spent doing other things. You could have hung out with that cutie you have had your eye on :)
My point here is that most of the time procrastination does not seem to be something that causes you any harm. You were going to do bad on the assignment anyhow, right? WRONG! Don't cut yourself short of time. Don't hang with the Big P even if he offers to buy beers or tokens. He is not your friend. "Just say NO!" and get to working on your writing. Do some freewriting, writing to music, or maybe even do some drawing. Do something that will get you to start looking at the ideas you have. The sooner you get your ideas down, the longer you have to try and understand them and see what those ideas really are. By writing again and again you will get a better grasp on your ideas, and the better you understand your ideas, the better you can explain them to others.