Browse the local newspaper to see what kinds of coupon inserts are offered in the area. The most common inserts are Red Plum, BrandSaver and SmartSource.
Search the Internet for the companies' websites. Most companies offer printable coupons online as well, if this is more convenient.
Fill out a form to receive the coupons by mail. Red Plum has a simple form that can be completed for free mailers. Additionally, SmartSource offers free coupons by e-mail.
Check the distribution list for companies that do not offer a free mailing service. Many inserts are also available in free publications.