Dave Ramsey is a wise, Godly man who understands how to manage money as a faithful Christian steward. There has been a lot of talk as of late among believers about how to approach this subject.
Dave Ramsey has written a thoughtful piece for the current economic crisis entitled, The Common Sense Fix. I encourage everyone to read it and act accordingly (if you live in the USA, of course).
Also, a good book to add to your library is Business for the Glory of God by Wayne Grudem.