You can change the look and feel of your site using the Appearance tab. When you click on the Appearance tab you’ll notice you have over 60 themes for your site to choose from:

[youtube]http://www.youtube.com/watch?v=TpfbkfGcDRI[/youtube]

WordPress paginates the themes and provides users with a preview of each theme that they can either activate or close and select another theme to preview.

See What Theme Should I Use? for help finding the perfect theme.