Quick rules:

1. No bigotry. That includes racism, sexism, xenophobia, homophobia, transphobia, hatred against non-binary people, etc.
2. Try to keep posts and discussion relevant to transition goals. Yes, you can ask about fashion or fitness or make-up in the comments, but at least have some inspirations in the parent post.
3. Self-posts are allowed, but as above try to keep on topic. Be sure to flair your self-post.
4. Flair your transition goals. choose whatever gender best describes what the goal is meant to inspire.
5. Tag any and all NSFW posts. You're allowed to post porn, erotica or skimpy outfits, but tag and label appropriately. User who post too much porn, erotica or fetish material in a short period will be warned.
6. No arguing over what is and is not a "realistic" goal. Let people source their inspiration and euphoria from wherever they want to, without judgement.
7. Keep it lighthearted! Avoid the darker topics surrounding the trans experience, there's better places to talk about those.
8. When posting artwork, link the original source in the comments. If you can't find one, at least try to find the artists profile or online portfolio. Tools such as Reverse Google Search or TinEye can be helpful.