Here are some of the sites and recommendations I usually make to people:
These ladies have a couponing class that teaches you what to do and how to do it. In your case, they offer it online relatively inexpensive.
The ladies who created this helpful site and system have recently written a book detailing everything to do with saving on a household budget especially with coupons. I picked a copy up for like $7 on Amazon.com
Saving Money Plan
This site has good deals listed. She also provides a free 6 week couponing class. It covers all the basics and then some. She also has a Coupon Data base that is helpful if you have a sale and need to know if you have a coupon for it.
If you are in North to Central Florida or Southern Georgia area check out MyCouponExpert. They hold regular coupon classes.
This is a good site too. I use their coupon data base regularly as well.
Check for some of the following couponing programs in your area: Coupon Sense; The Grocery Game
Hope this helps.