"Sunday papers continue to be the most popular source of coupons: 53 percent of households clip coupons from the Sunday newspaper, as opposed to 35 percent from advertisements that arrive in the mail, the next most popular source. Only 11 percent of households regularly look to the Internet for coupons, up from 6 percent in 2005, the study found, though the Internet is proportionally the fastest-growing source of coupons." [NYT]