WP Super Cache
By having a faster loading WordPress blog, your visitors will enjoy your blog more. They no longer have to wait a long time for your website to load up. Also, fewer Search engine robots will abandon your site because it takes too long to load.
I installed WP Super Cache on this blog, and my Website seems to load a little bit faster. The plugin generates HTML files, so Apache does not have to load heavy php scripts. It is also very easy to use, and customize. All you have to do is select on, and press the apply button.
WP Super Cache website http://ocaoimh.ie/wp-super-cache/