A year ago exactly I started following Kathy Spencer's site howtoshopforfree.net I read her book, How to Shop for Free: Shopping Secrets for Smart Women Who Love to Get Something for Nothing
I've saved $1000's. Her style of writing is very easy to read, especially dealing with a topic that can often leave people confused. Her forums are well organized and the members are super helpful.
So I was excited to read her Black Friday Guide, especially for $0.99. (since she's taught me not to spend more then a $1 for most things). Its a great read just before Black Friday, there still time to for you to save too! Simple tips on how to get the best deals, strategies you may know about but how to put them to work for you!
She has taught me to think about HOW I spend my money. I can't thank her enough.