Sprinkled them throughout the post, but I'll consolidate them -

Jon kills Dany.
Grey Worm gets killed by Drogon
As others have said, they establish a bunch of nation states to run Westeros, lead by Sansa, the weird kid from the Eyre, Gendry, Bronn, Tyrion (warden of the West), Yara, the new Prince of Dorne, and Edmure Tully (I think he's still alive). They hold some round table shit down in a somewhat rebuilt King Landing. Sansa sends Brienne to be her represntative while she rules the North.
Arya decides she's through with being a killer and marries Gendry. She doesn't live as a "lady," but helps him rule regardless.
Jon goes back to live in the true North beyond what's left of the Wall. With Ghost in tow, he goes to live near the cave where he first boned Ygritte, the only place he was ever happy.