This video takes you step by step through the information necessary to begin your marketing plan.
The video in this tutorial mentions defining your "one" person for a customer profile and a worksheet with questions to help you begin your definition. I've attached it here. The worksheet contains a link to a blog post with further information which I highly recommend.
Is the link in the PDF not working? Click here to read the blog post on focusing your marketing message to a customer profile and not just a target.
http://www.firepolemarketing.com/blog/2011/04/30/customer-profiles/