You save the most when you match up the sale items with manufacturer or store coupons. Of course it helps when your store doubles coupons too! It takes a while to get the hang of it and know when to really stock up on sale items but it is worth it in the long run. And yes I agree that saving even just $30 is a good thing...money left in your pocket
Have you read Stephanie's e-books?? They explain the couponing process really well.