Almost three years ago I released my brand persona questionaire. It has been very succesful, but even better is the enemy of the good. So I decided to update it and make it easier to understand. Hop over to the article to download the new version - and if you missed it the last time, the post explains how to use it.
PS: If you don't want to use excel feel free to port the questions to you google docs form or another survey software - but don't forget the attribution :)