WordPress.com Support Page (Official) – WordPress.comWhile this site is written for the WordPress.com platform, much of what is explained in their very helpful pages and video guides apply to the RHUL WordPress platform too. With all their content in plain simple english, this is probably the best starting place for those new to WordPress.

Getting Started with WordPress (Official) – WordPress.org
Guides for new users, running through every aspect of WordPress in detail.

WordPress FAQ (Official) – WordPress.org
Perfect for new and experienced users alike – This FAQ section of WordPress.org covers everything from New User questions, through Installation of WordPress to Layout and Design questions.

The Definitive Guide To Higher Rankings For WordPress Sites – Joost de Valk
WordPress is one of the best, if not the best content management systems when it comes to SEO. That being said, spending time on your WordPress SEO might seem like a waste of time, it most definitely is not. Optimizing your site to the best practices outlined in this article will help you improve your rankings, gain more subscribers and have a better website in general.