Digging into WordPress has recently published a new article on securing WordPress. It covers setting up optimal database privileges, adjustments you can make to your wp-config.php file, changing the table prefix, changing the default admin username, and a couple other things.
Of course, when it comes to the security of your WordPress site, these techniques are merely the beginning. As you continue in your WordPress travels, you will discover many, many more ways to increase the security of your site. By implementing the methods presented in this article during the setup process, you will be strengthening the security of your site’s foundation, providing yourself a solid platform on which to build.
Definitely worth a read if you haven’t already looked into the techniques.
How to Secure Your New WordPress Installation [Digging into WordPress]