Once I've got a draft out and I've given it a pretty good run-through on edits, I ask myself questions.
Questions like:
Am I grabbing their attention? Yes? How? Where? Who's attention, exactly, am I grabbing? Still that same person I identified in TalkTip Day 1?
Does that attention-grabbing happen in the right place in the talk? At the beginning? At the end?

Once I've got folks' attention, how am I keeping them engaged? Am I losing them anywhere?

These are some of the questions I ask myself once I've entered the editing phase. Every once in a while answering these ignites a lot of rewriting.

What questions do you ask yourself?