Stopping Is Not Ending
Ask anyone who has roleplayed for a few years to name a story they finished and watch them struggle. Threads fade, partners drift, and a year later there is an unanswered post nobody wants to be the one to abandon.
An ending is a decision. It almost never happens by itself.
Name the Shape Early
You do not need an outline. You need one sentence about where this is heading: "I think this ends when she chooses the city over him." Say it out loud in week two, not month eight.
Partners write differently when they know what they are building toward, and the story stops being an infinite present tense.
The Last Scene Should Answer the First
Good endings usually rhyme with beginnings. If your first scene was two strangers being careful with each other, your last scene has something to say about whether they still are.
Look at your opening post before you write your closing one. It usually tells you what the ending owes.
Character Death Is a Tool, Not a Finale
Death ends a character; it does not automatically end a story, and used as a full stop it often feels like a shrug. If a character dies, the interesting writing is what it does to whoever is left — which means death works best somewhere before the end, not at it.
And it needs consent. Killing a character your partner has spent months in is not a plot twist you spring.
Let Them Get Something, Not Everything
Endings that give the characters everything feel unearned; endings that give them nothing feel spiteful. Aim for a trade — they got the thing and lost something to get it, or they lost the thing and kept something that matters.
An Epilogue Costs One Post
Write a short scene set later. A year on, a letter, a door. It closes the story properly and it costs almost nothing, and it is the single most common thing writers regret not doing.
Ending Well Is How You Get the Next One
People remember how a collaboration ended more than how it went. A partner you finished a story with is a partner who says yes next time. A partner you left on read is not.