This is one of those plugins that HAS to be on every WordPress install I use. Its called pageMash and it allows you to rearrange the order of pages. Then just drag and drop your way to it. It also allows you to hide certain pages.
Customize the order your pages are listed in and manage the parent structure with this simple ajax drag-and-drop administrative interface with an option to toggle the page to be hidden from output. Great tool to quickly re-arrange your page menus.