By default, the left hand column of your blog contains a calendar, a list of links to most recent entries, a list of links to galleries (if you have any), links to and the first few words of your most recent comments, a list of links to any tags that you have used and a list of links to different types of entry. At the bottom of the left hand column are two buttons for RSS feeds. Underneath the RSS buttons is a section which shows whether you are signed in and a link to sign out. Underneath this, are a copyright notice and the Warwick logo.
However, you can change this by removing items which aren't relevant on your blog, and adding other items. To do this, click 'Admin', then choose 'Sidebar', which will take you to this screen, where you can add, remove and edit your sidebar items.