The most successful advertising is word-of-mouth, right? Jupiter communications estimates that over one quarter of Internet sales in 2005 will have originated at affiliated sites. Affiliate programs provide incentives for visitors or complementary companies to recommend your company's products and services to others. Such incentives could be cash, referral fees, or even discount arrangements. Include information about your affiliate program on your web site. You will need site traffic analysis tools to track affiliate referrals so you can appropriately compensate your affiliates.