Yes. Yes. Yes. Yes. Yes.
I cannot emphasize his ideas enough. Pick up Total Money Makeover, or even better, get it from the library (savin' money already ) and read it. Do it. It works.
He's even got a talk show on XM that you can listen to on channel 165 if you've got it. You can even call in to get in depth advice from him.
You might not like what you hear, but if you follow it, you will be debt free, most likely in those 18-24 months you predicted. He talks about cutting out almost every "luxury" that you have, or at least can stand for these months. That sometimes includes your nicer, newer, usually unpaid for car that can be replaced with a $2500 beater for now.
His motto "Live like no one else now so you can live better than everyone else later" (or something like that) really rings true in this sense.
As for your grad school, is it going to [immediately] going to give you a raise or is it necessary to keep your current job? Or is it just something you wanted for the future? I ask because if its for the future, you might want to put it off for now until you're debt free.
As for earning extra cash, he says to do everything in your power, even if its something as simple as delivering pizzas for a while after your "real job."
Good luck, Hoglover. I'm sure this decision will make your life much easier and less stressful for the future.
PS, Jilly, did you hear about Dave Ramsey from Shugart's massachusetts seminar? I ask because thats where I heard of it.