Written Surrealist Composition or First and Last Draft.
Having settled down in some spot most conducive to the mind's concentration upon itself, order writing material to be brought to you. Let your state of mind be as passive and receptive as possible. Forget your genius, talents, as well as the genius and talents of others. Repeat to yourself that literature is pretty well the sorriest road that leads to everywhere. Write quickly without any previously chosen subject, quickly enough not to dwell on, and not to be tempted to read over, what you have written. The first sentence will come of itself; and this is self-evidently true, because there is never a moment but some sentence alien to our conscious thought clamors for outward expression. It is rather difficult to speak of the sentence to follow, since it doubtless comes in for a share of our conscious activity and so the other sentences, if it is conceded that the writing of the first sentence must have involved even a minimum of consciousness. But that should in the long run matter little, because therein precisely lies the greatest interest in the surrealist exercise. Punctuation of course necessarily hinders the stream of absolute continuity which preoccupies us. But you should particularly distrust the prompting whisper. If through a fault ever so trifling there is a forewarning of silence to come, a fault let us say, of inattention, break off unhesitatingly the line that has become too lucid. After the word whose origin seems suspect you should place a letter, any letter, l for example, always the letter l, and restore the arbitrary flux by making that letter the initial of the word to follow.
From: What is Surrealism? an essay by Andre Breton
A Combination resource-dump, workshop, and virtual commonplace book all rolled into one.