Closer to the date I will post a list of how to help the mod, but the basics are:
(1) post the work in your journal, AO3, archive of choice, etc... (2) post here with a link to the work, and (3) if you have multiple works in the same fandom, make one post with all the links. If you have works in multiple fandoms (which usually me), make a separate post for each fandom.
Like I said, I'll have a post go up closer to 1 September with all the coding and such that could be needed. We post outside this journal because, in addition to porn, we want to expose people to new fandoms and fen on IJ.