How to design a page created using Views
The easiest way to style a page generated by views is to simply edit the CSS.

If you need more control over the markup generated you can use Semantic Views to clean up and improve the generated HTML.

Another simple solution is to manually add a template: there's a "Theme" section in the Views UI (just above where you set the Path and Menu Item). There you can select the best template to use (views-view--YOURVIEWNAME--page-1.tpl.php or something similar) and copy &amp; paste the default template code.

Then, create a file with the same name in your Templates directory (views-view--YOURVIEWNAME--page-1.tpl.php or something similar) and past the code there.  You can now edit the template as if it were any other!

If it isn't getting recognized by the View, don't forget to go back to the "Theme" section in Views UI and click "Rescan template files" to make sure it's found!