Better WordPress Rich Text Editor

• Download this zip file and extract it to view the contents on your computer
• Copy the advanced-wysiwyg.php file to your WordPress Plugins Directory located here: /wp-content/plugins
• Copy all the files from the plugs folder (from the file you downloaded) to the TinyMCE Plugins folder located here: wp-includes\js\tinymce\plugins
• Activate the new editor by opening up the administrator view of your WordPress page
  • Select Plugins (on the left)
  • Activate the Advanced WYSIWYG Editor plugin
• That's it! Next time you go to make a post you will have significantly more formatting options.

References:

http://www.mkbergman.com/275/extending-tinymce-the-wordpress-rich-text-editor/