If you're site is using Wordpress and it seems too slow, a simple way to speed it up is by using the PHP Speedy plug-in for Wordpress http://aciddrop.com/2008/03/07/php-speedy-wordpress-plugin-preview-release/. PHP Speedy speeds up pages by automatically joining files to reduce the number of requests that are made and compressing and minifying files to reduce bandwidth. It also takes care of handling caching so that fewer request are made to your server. All of this can be done manually. But most people never bother or know how to do it. With the PHP Speedy plug-in for your WordPress blog, it's all taken care of automatically.