Reduced the guidelines to the following:

For a good experience with peer assessments, follow a few guidelines.

-  Only create peer assessments in a test course, or a course that is not released or in progress.
-  If your course will include peer assessments, add and thoroughly test all the peer assessments *before* the course is live.
-  Use peer assessments sparingly at first. Only include a few in your course, and make sure that you have contingency plans in case you run into problems.

Finally, if you're at an edX consortium university and you plan to include peer assessments in a MOOC, make sure to notify your edX project manager (PM).