I think reviewing the slides from the January 2011 Academy 2 about the self-referral will help you organize your scripts and answer your question (Located on www.committedadvisor.com, under “Resource” tab and “The Referral Prcoess.” Permission to access only to those in the Committed Advisor Program.) Essentially, you are asking questions to help you determine if you should make the offer. The way you know is when they have told you things that are clearly emotionally compelling for them which you can insert into the “make the offer” portion of the script.
Every day you do the best you can with you current level of skill. The more people you speak with the better you will get. Don’t let your desire to be perfect, prevent you from getting started.