Improve your products (and the ability to sell them) with photos.
http://www.wilsonweb.com/ecommerce/wilson-product-photos.htm

A good slide show of information on testimonials.
http://www.marketingexperiments.com/images/multifiles/articulate/webclinic-07-09-08/player.html

Some ways to increase your email response.
http://www.wdfm.com/marketing-tips/solo-email-response.php

A nice issue from sitepoint.
http://www.sitepoint.com/newsletter/viewissue.php?id=2&issue=405

Enjoy your day!