Save your fic, skip the indentation.
Indentation may be necessary in a high school essay but on Archive of Our Own, indentation can make the reading experience unpleasant, especially if your paragraphs tend to be shorter.
When it comes to line alignment, go left.
While making your text justified may look best at first, it is hard on the eyes to read for longer stretches of time (especially when late at night—which is when most people tend to read fanfic!) So, for the sake of your reader, consider using left alignment.
Use quotation marks, it’s in the name.
Even though it may be super obvious and easy to some, formatting dialogue into your fic can be tricky; let me save you some time. Indicate what is being spoken by bracketing it with quotation marks (these guys → “”) and refrain from using any other method, especially italics.
Shut up, I’m thinking (not talking)
So what do I use italics for? Glad you asked: Italics are typically used to demonstrate a character’s thoughts or emphasize a word or statement. Additionally, you may want to italicize a quote, song lyric, etc. Really, feel free to italicize anything you want, except, of course, dialogue.
Meet your new soulmate, horizontal lines.
No longer are the days of thirty identical emojis and “POV SWITCH” spelled out in bold in the middle of a fic. If you are cutting to a new scene or switching points of view, just insert a horizontal line and call it a day.
*Not applicable for fics under 1,500 words*
Having more chapters may seem more appealing on the surface, but having to press the next chapter button every minute can be a major deterrent for readers, especially those who use ao3 on their phone. Thus, if you have a 20k fic ready to go, think about splitting that baby into ten chapters instead of twenty. Remember, ao3 does not have a sort by chapter number option—only word count.
Yeah, yeah, it’s summary time
Man, summaries can be confusing to navigate no matter if this is your first or fifth fic. Here are a couple things you should not do when writing your summary.
Writing the word “summary” in the summary
Putting a really long author’s note in the summary
Saying “this is really bad” or “this is my first fic” and the like. (they can go in the end notes if you really want to tell your readers, but also, be confident!)
The same goes for “please give kudos and comment” and “please read”
Having a “explainer” summary.
For example, something like, this is basically my take on what i think happened after endgame because DC sucks. gwen is sad after peter breaks up with her so she gets revenge and starts a ~relationship~ with troy bolton
Having a really long summary. At most a summary should be 8-10 sentences but I would aim for shorter.
Putting a disclaimer in the summary. The great thing about ao3 is that you do not need to include a disclaimer for reasons that a far too complicated for me to sum up here, but if you would like to read up on it click the link: https://www.transformativeworks.org/faq/
Additionally, below are some examples of good and easy to read summaries. One is an actual summary while the other is a carefully chosen excerpt from the “fic”
O Rich Text! My Rich Text!
The rich text option on ao3 is a life saver and I highly recommend you take advantage of it. Not only is much more user-friendly, but when copying and pasting your fic, the line spacing won’t come out all wonky like it does when you copy and paste into the html box.
Tagging on ao3 is one of those things that, like summaries, seems daunting at first but is actually pretty easy once you get the hang of it. Now, I feel it would be best for me to explain tagging in another post as there’s a lot to cover and this post is already pretty long, so look out for that in the next couple of days.
And always remember the golden rule of fanfiction…
Write in Third Person, Damn It!
(unless it’s a stylistic choice, of course.)