There are two really useful checklist modules in Drupal:

• The SEO Checklist module gives you a rundown of all the search-engine optimization fixes you can make.
• The Security Review module automatically tests for easy-to-make security errors.

In this video, taken from our Drupal 7 Security class, Robert introduces the Security Review module. He shows you how to fix some of the most common errors found by the module, such as "Base URL is not set in settings.php" and "Some files and directories in your install are writable". Even if you think your site is safe, give the Security Review module and you may well find something you missed.