I have mentioned christianaudio.com before.  As the name suggests, it is a great site for downloading Christian audio books.  It also has some amazing sermons/teachings/messages, many of which are free.  In particular this week I came across some rock solid teaching from John Piper on significant figures in the history of the Church.  I was blown away by what he shared about Spurgeon and Mueller.  It went way beyond informational to inspirational.  I highly recommend this to you.  Visit christianaudio.com.  Click “best sellers” and scroll down until you find the appropriate messages from John Piper.  I think you will also find other teachings of interest as well.