How do I...?

I'm pausing in the heat of battle (in mid-sentence in the middle of a war, to tell the truth) to ask some questions.  I am making the push tonight to see how far I can get toward done.  I suddenly feel like I want to write.  Perhaps it was the really good job interview I went on today, perhaps it's the weird high clouds and the snow on the peaks in the distance.  Whatever it is, I am suddenly interested in finishing this book where before I was scared of it.

So I have some questions.  The first being:  how do I choose what I am going to read?  I am scheduled to read on the radio next Wednesday (part of my push to finish), but I have no idea how to choose what I will read.  I heard from one person it's a 20 minute segment.  I have no concept of how much air time translates to pages of manuscript.  For those of you who have done this, what would you recommend?

I've also decided Molly Bates' fate:  she will be the heroine in The Whisper and the Roar, my "I am destroying Los Angeles through a series of natural disasters" action romp.  I started it a couple of years ago, and I think her perspective would turn it into a fabulous book.  I mean, if the world is falling around her ears and all she wants to do is save her poodle, what better premise could their be?  Here's the current logline for the novel:

A frumpy and overly-imaginative homebody must traverse a disaster-ridden Los Angeles in order to rescue the only thing that matters to her in the world – her toy poodle.

I also would love any suggestions on editing.  I am looking toward the next steps, and don't know how to edit a novel.  Any tips would be most helpful.