Add a simple “Subscribe To Our Newsletter” email submit on your landing page, linked to your email management software. If you are driving high amounts of traffic to a specific landing page, chances are a decent percentage of your traffic will want to subscribe to a newsletter that contains relevant information. (Make sure you get your visitors to double opt-in for CAN-Spam compliance.) A double opt-in email list is perfect for you to up sell offers in the vertical that you’re promoting. This will help create more stabilitly within your affiliate marketing campaigns and allow you to test offers for free with your email list.

An optimization technique such as this newsletter subscription is a win-win situation; let me know how it works out for you.