*Good landing pages can have a huge impact on your sales levels.
Your web site needs more than just one landing page; you should have a distinct landing page for each offer or type of link. Repeat the phrase used in the link from your online affiliate program on the landing page itself, because this reassures your visitors that they have come to the right place. Don't confuse them with multiple offers, but do drive home the one thing you want them to do, whether that's to sign up for your newsletter, register as a new member, or make a purchase.
Make it easy for visitors to complete their task. Your web site affiliate program will see huge improvements once you make the effort to develop good landing pages.