For a user / seo perspective, what is the best way to code a drop down menu nav bar? Is it best to use css, javascript or a scripting library like jquery? I am thinking about overall best practice that will not have a negative impact on serps. I am also thinking about what will work best on all types of devices i.e. desk tops, lap tops, smart phones and tablets. What are the Pro's & Cons of Using CSS for Drop Down Menus. What are the Pro's & cons of using Javascript for drop down menus. And the same question for jquery. Thank you all in advance for your ideas.

My domain name is free with my service with yahoo but it expires every year and gets extended automatically as I continue service, how does this impact my seo efforts? I've heard that the search engines prefer sites to expire in 3 years or more? Is this a fact?

If you only had 3 SEO books to read which ones would they be?

The Warrior Forum just changed there membership from free to paid. They have do follow attributes but I was wondering what peoples take is on joining them for both learning and seo purposes?