Author Alexandra Sokoloff offers great tips for writers on her blog, especially on story structure.
Here are two story structure checklists to help you hit all the right elements at the right time in your plot. Really great for revising, or when you're stuck. Both checklists contain basically the same info, just presented in different ways:
Narrative structure cheat sheet
Story elements checklist
Check out her blog for complete explanations of each of the elements in her lists. Tons of great info, plus story analysis and breakdowns.