Well, my writer's critique group listened to the last 20 pages of my ms last week and had some great suggestions for tweaking the ending. Not changing it, mind you, just switching a few details around so the effect is more of a Pow!.
I'm taking a break from my story for a week or two. Going to catch up on some pleasure reading, finish my last few days of summer program work, go to a wedding, take a couple day trips with my hubby, that sort of thing. That way, when I pick it up again, I'll see it with fresher eyes. I know I need to rewrite the beginning, in part to introduce a character that plays a strong role at the end, but also to better line up the conflict described at the beginning with the resolution offered at the end.