Another place to find coupons is on the web. Go to the websites of your favorite companies and stores. They may have an email newsletter or mailing list that you can join. If so, they may email you links to printable coupons, reminder of upcoming sales or when coupons for their products will be in the Sunday paper, or even send you coupons in the mail.
You might also want to use the "Contact Us" link at their site to tell them how much you enjoy their products. Be sure to include your name and address and you may be thanked with coupons in the mail.
On the other hand, if you've had a disappointing experience with one of their products sharing your thoughts might also get you a free item coupon. Recently I bought a product that had a coupon inside but that coupon was expired. I contacted the company and they sent a duplicate coupon with a later expiration date as well as a coupon for a free product.
While you're online check out SmartSource, Red Plum and Coupons.com. You can pick and choose coupons from these sites to print. You may have to download and install something. These three sites a reputable sites that don't include spy ware with those downloads. Be wary of other coupon printing sites that want you to download something and use at your own risk.
Remember to make sure your favorite stores accept "Internet Printables". Due to some people abusing the printables (printing massive amounts of the same coupon or using a graphics program to change it to suit them) some stores no longer accept any printed coupons. Some stores only allow a set number of printed coupons per transaction.