The backbone of every decent piece of fiction writing in the past 100 years.
Three Acts, a way to transition between them, a way to hook your reader early and a couple of places to drive home the stakes. These exist in all fiction, but are a lot easier to spot in genre fiction (sci-fi, crime fiction, fantasy and the like).
I break all of this down at my other site, Beach Nut Press. Pop over and read all about it.