Freed from slavish adherence to conventional Western notions of sane behavior, you will be better able to achieve the monomaniacal state necessary for writing a coherent paper in less than 48 hours. The night before the paper is due, take a shower before sitting down to write. Note that this procedure will not be beneficial to everyone. When actually writing, a proper working environment is essential. Pile as many books and papers around oneself as possible, as this serves to hinder one's movment , making one less inclined to get up and do something else.
Background noise is also essential.
The more the better, as this prevents one from falling asleep at the keyboard. This brings us to the topic of stimulants, an important component of the creative process. I confess a predilection for strong black coffee. Thus, the coffeepot is another important component of the paper-writing environment. It should be kept within reach of the computer, but not so close as to cause electrical shortages and possible loss of data if spilled.