New Rules of Lifting for Women is a great book. It should be in your library and available for purchase at all the usual sites or stores.
You are doing yourself a huge favor by doing this now. I'm about the same age as you, and given everything I've heard and read about what the next stage of life will bring, prevention is golden!
"If you drop an egg, you don't say, 'Oh, shoot' and drop the other 11, do you?"
-Source unknown, but obviously brilliant
Reached goal 4/16/2010...but kind of afraid to look these days