Conflict and Endings in your Screenplay

Here is a nice blog about endings. It is said that Edgar Allen Poe used to write his endings first and then write his story to match that ending. This blog also recommends that: http://thescriptlab.com/screenwriting/structure/the-outline/72-endings-and-beginnings
And here's how you can make your stories interesting and appealing to your audience: http://thescriptlab.com/screenwriting-101/screenwriting/script-tips/464-character-want-conflict-story#