How to claim a 'vanity URL' for your Facebook page

A relatively new innovation in Facebook is the introduction of 'vanity' URLs for both profiles and pages. There's nothing terribly vain about them – it just means you can have a shorter, more meaningful, unique URL (web address) for your Facebook page than the default string of numbers.

I've just got one for the Facebook page for this book/blog. So, I no longer have to direct you to
www.facebook.com/pages/Get-Up-to-Speed-with-Online-Marketing/133980626621610 but to the more concise, memorable, ...