I think it's interesting that our list mixes items that explain how Perec frames a descriptive point of view (for example #s 1, 5, 6) and items that explain how Perec uses language in his descriptions (for example #s 8, 9, 10) and items that speculate about his writing process (for example #s 13 and 14). Of course all of these things are worth considering as you work.
1. Write about surfaces, not "interiority." In other words, write about what you can observe outwardly, not about what you or others think and feel inside.
2. Make carefully-chosen observations and let the reader draw her own conclusions.
3. Make lists, but not random lists: ordered lists, thematic lists, chronological lists, lists that record the arrangement of objects in space or arrange them by size or color or smell or shape; rhythmic lists that alternate long and short phrases, big "million dollar" words and tiny, simple words. By giving an order to the elements of your description or by establishing a rhythm, you can create variation or surprise when that order or rhythm changes. Play with your lists.
4. Pay attention to the language and not just the "content": the words you are writing and not just what you are writing "about." Make aesthetic decisions. Singular or plural nouns? Past-tense verbs or "ing" verbs? Try changing what you have already written to see what difference the changes make.
5. Focus on sensory details: sight, touch, taste, smell and hearing. Try to describe things in a way that allows the reader to experience the scene actively and directly, instead of "talking at" the reader.
6. Focus on the functionality of objects and the ways people relate to them. Consider the uses an object is designed for and the uses to which it is actually put -- and the differences between them, which can be quite funny.
7. Focus on the dimension of time. Consider the passage of time (minute by minute, day by day, season by season) and its effect on the objects of your description. Consider the routine uses of an object: who usually does what with it and when.
8. Use an absurd number of synonyms. Say the same thing in a number of different ways. Use all of the words for a thing instead of choosing between them. Consider how the subtle differences between synonyms change the description of an object or the tone of a passage, and adjust your description to take advantage of those differences.
9. Use parentheses to explain things (or to make them more complicated). Use parentheses to keep the sentence moving (by quickly providing extra information) or to interrupt the sentence (with a long aside: for example, the word "parenthesis" (plural "parentheses") refers both to a punctuation mark and to any clarification that interrupts the flow of the sentence, which means that you can have parentheses without parentheses) and distract the reader.
10. Use repetition as an ordering device: "A bedroom is a room which.... A dining-room is a room which.... A kitchen is a room which" etc. The person who provided this example notes that the repetition of the word "room" with the indefinite article "a" makes it sound like all rooms are interchangeable: "it doesn't matter what is inside the room because it is still going to be a room." The kinds of room that make up our households are defined at least in part by what we put in them -- like the guy I knew in college who saved on rent by making his bedroom in a large coat closet. See Technique #6.
11. Play with punctuation. Use it, avoid it, overuse it, and see what effects this has on the rhythm of the piece.
12. Write some sections in prose and other sections in "almost poem-like" lists.
13. Write "on the fly," adjusting as you go to take advantage of the possibilities that come up as you write. Don't get locked into a preconceived idea of what you are doing ("I'm going to describe everything on this shelf and then I'll be done") or what you are writing about. Write to figure out what you are writing about.
14. Revise your work! "There's no way Perec wrote this stuff on the first try." Change something. Change everything. Change it again. Go back to your earlier changes. Change them some more.
15. Make use of surprising and unexpected adjectives.
16. Ruminate!
17. Include definitions in the text -- but thoughtful definitions, not just stuff that's copied out of the dictionary. Explain the nuances of a word for time to time. See technique #8.
18. Focus your attention on a scene by asking yourself questions about it.
19. Think of yourself as a "guide" to a particular place, object, or activity. Write as if you're explaining it to someone who doesn't understand the simplest things about it -- like an "anthropologist from mars" or a small child. Uncover the obvious. See the things you've ignored that have been right in front of your eyes the whole time.
20. Include an absurd amount of detail. Describe every facet of an object, every step of an action, every move someone makes.
21. Use the particular to describe the general.
22. Compare things to discover what makes them the particular things they are. How is a loveseat different from a couch? How is a living room chair different from a dining room chair? How is a couch different from a living room chair? See technique #19.
ONE FINAL NOTE: A handful of people wrote "be original" in their list of techniques. I didn't include that on the list because it describes a state of being, not a technique. Telling a writer that she should "be original" without giving her any guidance about how to do that is like telling an athlete to "be a winner" without helping them to train. See technique #19.