Remember, if you have particular products that you love and buy often-Go to that company's fan page on facebook. Often, companies will post coupons for their fans. Follow them on twitter and also, go to their webpage. Almost every brand has a newsletter and they will send you coupons by email!
Here's a short list of what has been available recently:
$1/1 Tom's of Maine Toothpaste or Mouthwash 9/18/2011 SS Insert (exp 11/2/2011) If you don't have any in your insert, check on ebay and you can bid on them.
$1/1 Seventh Generation Products 7/31/2011 RP Insert (exp 10/31/2011)