On the bottom half of this page is the results from Yslow along with suggestions for improvement.
Based on what these tools can offer, here are 7 tips to make your websites load faster:
1. Minify HTML, CSS and JavaScript: To do so, remove all unnecessary comments, white space and code. This will improve performance because the file size will be reduced. To minify HTML, check out HTML Compress. For JavaScript, use YUI Compressor, and for CSS, test out CSS Compressor. A fourth option is to make use of the PageSpeed Insights Chrome Extension to create an optimized version of your HTML code. The PageSpeed Insights page also lists other programs you can use.
2. Make CSS and JavaScript External: Using external files will generally make the pages load faster because JavaScript and CSS files are cached by the browser.
Alternatively, if you use CSS in a web page, place the CSS in the HEAD element. This makes the page appear load faster and it can do so progressively. With JavaScript, move the scripts to the bottom of the page.
3. Eliminate Duplicate Scripts in a Web Page: This issue might seem strange but it is actually quite common. Duplicate JavaScript and CSS files degrade performance by creating unnecessary HTTP requests and wasted JavaScript execution. It´s also important to check and see if scripts have been duplicated in external files, as well. To avoid this problem is to use a script management module with your templates.