Get an anti-procrastination coach. If you are really determined not to procrastinate, then get help from the supportive people in your life.
Tell someone about your writing goal and timeline, and ask them to help you determine whether or not your plan is realistic. Once or twice a week, email with a friend, relative, or mentor, in order to report (admit?) on your progress, and declare your promise for the next week (or few days). If, despite your very good intentions, you start procrastinating again, do not think, “All is lost!” Instead, talk to someone about it. They may be able to help you put your slip into perspective and get back on track.
Get a buddy. See if you can find a friend to work alongside you. They don’t have to be writing a paper; in fact, they can be playing Solitaire, for all you care. What matters is that you arrange to meet them at the library (or wherever you have decided to write) at a particular time and stay there for a specific period of time, thus creating accountability.
Get help with your writing. If you are procrastinating because you think you are a weak writer, then ask someone (a Writing Center tutor, a current or former professor or teaching assistant, a friend) to help you improve.
Form a writing group. A writing group is a great way for undergraduate and more advanced writers alike to create accountability, get feedback, and simply get reminded that you are not alone in the struggle to produce and to improve your writing.