At the end of my list of links to reviews of trans and/or non-binary literature by trans and/or non-binary reviewers, there is a resource list. I pulled out most of it as a separate resource post for writers, and then added to it. All of these essays and resources were written/created by trans and/or non-binary writers.
General Essays On Writing Trans &/or Non-Binary Fiction
Dear Cisgender People Who Write, Publish, and Read Trans Books by Constance Augusta Zaber, a trans woman writer and critic
Writing Better Trans Characters by Cheryl Morgan, a trans woman writer
Should I or Shouldn’t I? On Writing Trans Narratives Respectfully by John Jacobson, a non-binary genderqeer writer
How to Write Trans Characters by Everett Maroon, a trans man writer
Being Trans is a Lot Like Being a Book by Austin Chant, a trans man writer
10 Helpful Tips from a Trans Woman for Making a Trans Woman Super Hero by Mey Rude, a trans woman writer and editor
Ways to Introduce that a Char is Trans (& Pitfalls to Avoid) by Xan West, a trans stone butch/genderqueer writer (a twitter workshop focused on romance, but useful for other genres)
Introducing trans and/or intersex characters – some common and less common pitfalls! by Bogi Takács, an agender trans writer and reviewer
Trans and/or intersex characters, visibility and invisibility! Some common (and to me it feels like *increasingly* common) pitfalls by Bogi Takács, an agender trans writer and reviewerr
Writing Non-Binary Characters – A Primer by Cecil Wilde, a non-binary trans writer.
Trans Tropes That Have Got to Go (as Told by Trans Readers) by Avery, a neutrois/agender writer and reviewer
Deadnames in Fiction by Ana Mardoll, a non-binary trans writer.
On Trans and/or Non-Binary Children’s Literature
Evaluating Transgender Picture Books; Calling for Better Ones by Kyle Lukoff, a trans librarian and author
Second Trans on the Moon by Kyle Lukoff, a trans librarian and author
On Trans and/or Non-Binary YA
The Acceptance Narrative in Trans YA by Vee, a non-binary trans blogger
The Hero’s Journey in Trans YA by Vee, a non-binary trans blogger
Trans Representation in YA Is Only the Beginning by Everett Maroon, a trans man writer
On Trans and/or Non-Binary SFF
Gender, Sex, and Sexuality in SF: A Conversation between Polenth Blake, a non-binary writer, and Bogi Takács, an agender trans writer and reviewer
Some pitfalls related to shapeshifting, gender, and trans people by Bogi Takács, an agender trans writer and reviewer
Changing Images of Trans People in Science Fiction and Fantasy Literature by Cheryl Morgan, a trans woman writer
Beyond 101: a conversation about trans and/or non-binary SFF with Katherine Cross, Margaret Killjoy, Ana Mardoll, K.M. Szpara, and Vanessa Rose Phin.
Transcending Flesh: Gender and Body Diversity in Futuristic and Fantastical Settings by Ana Mardoll, a non-binary trans writer.
On Trans and/or Non-Binary Erotica and Romance
Talking Trans Erotica with Tobi Hill-Meyer by Jetta Rae. Tobi Hill-Meyer is a genderqueer trans woman writer, editor, actor and filmmaker. Jetta Rae is a trans woman writer and editor.
You and Me Could Write a Trans Romance, a Hopeless Romantic podcast episode with Austin Chant, Sam Schooler and Amanda Jean.
On Comparisons: Writing Trans Characters in Same-Gender Romance by Austin Chant, a trans man writer.
On obligatory scenes in trans romance by Austin Chant, a trans man writer.
On Internalizing the Cis Gaze When Thinking About Sex and Relationships (discusses this issue both in communities and in trans romance and erotica), by Xan West, a trans stone butch/genderqueer writer
On Trans &/or Non-Binary Poetry
Waves Breaking, a podcast showcasing the talents of transgender, genderqueer and other gender variant poets, hosted by Avren Keating, a non-binary poet and artist.