If you don't know this new tool, you should consider worth to use it. His name is: Google Page Speed Online. Let's take a short tour about what he does.
Google gives strong attention to the pages loading speed. It is one of the strongest key indicators that Google uses to rank websites in his search engine. A website with a height amount of slow pages drives his ranking to be hardly lowered by Google. And this website will receive fewer and fewer visitors... But anybody wants that for his website!
For this reason, Google has built a new tool called Google Page Speed in order to give you the ability to test your web pages in order to discover performance issues. It gives you many relevant advices to optimize your website, clean up your codes and graphics and speedup you pages. After a deep work in your website engine, you will be ready to be well ranked by Google!