Some more Tips can be found here.
Web Performance Best Practices
http://code.google.com/speed/page-speed/docs/rules_intro.html
14 Rules for Faster-Loading Web Sites
http://stevesouders.com/hpws/rules.php
I use Google Page Speed Firefox Plugin to investigate the scope of improvement in my Web Applications and improve them.
Tips to optimize your website speed Reduce the size of images. The bigger the size of image, speed of website will be slowed down Remove unwanted elements.( files, images, scripts, etc) Less usage of image. Decorate your text using CSS style. Don’t include CSS or JavaScript code in your HTML documents. Create separate file and folders and call them when … Read More
via SEO Journal Online – Organic Search Engine Optimization