Fine roundup of the key factors of ideal domain names on promotionworld.com: The perfect domain name should be short and simple as possible, while being unique and also suggestive for your business category. A crucial point especially if your domain name should perform internationally: It should be easy to interpret and pronounce as well as being as easy to spell as possible for the users in your key markets!
Google offers (among many other great free tools!) a tool called “website optimizer”, which enables very easy testing of different pages … a must see for those who do not know it yet http://services.google.com/training/websiteoptimizeroverview/2995095/index.html
Another interesting read on how to optimize product pages found on www.vertical-leap.co.uk: A product page SEO checklist. But, as in many other cases, this does not only affect your rankings in search engines but also so many other areas such as – helpful and interesting product descriptions is a must that positively affects SEO, usability, user experience, conversion, … and finally, profit http://www.vertical-leap.co.uk/blog/product-page-seo-tips/
Quite unbelievable story, shows how supposedly small changes can make huge differences: http://www.uie.com/articles/three_hund_million_button/