Helpful Hints on Designing Websites to Sell Products
Smashing Magazine has an interesting article on the key points to consider when designing a website that has to sell a product. The suggestions range from the subliminal - putting pictures of happy people to welcome people in, through the theoretical - such as the Guttenburg principle of how our attention moves across and down a page, to the practical - always provide a next step for users to move to. Definately worth a read.