Here is a great book that has made a huge difference in the way I look at content.
Content Strategy for the Web – Kristina Halvorson
With 52 sites and 100’s of pages of content, it is easy to lose track of everything! The really important take-away from this book is to make a Content Audit. Make a list of all the content you have, organized by category, PageRank and then see what is converting and what isn’t.
Guaranteed to change the way you look at, create and post content.