http://jamescrisp.org/2008/12/20/review-javascript-the-good-parts-by-douglas-crockford/

http://www.stevesouders.com/blog/2009/12/07/downloading-javascript-as-strings/ <- in order to improve performance

Possible benefit of using library JS from other host - http://encosia.com/2008/12/10/3-reasons-why-you-should-let-google-host-jquery-for-you/

Use iframe to make script load async - http://www.i-programmer.info/news/81-web-general/2137-google-makes-web-pages-faster-with-a-simple-tweak.html