Busy Teacher - 10 things to get most out of your guest presenter.
Thoughts on Teaching - How to prime students for guest presenters.
Deca.org - Step-by-Step tips on what presenter to get, how to get them and how to proceed.
Yahoo Voices - Good tips on who to get as a guest presenter for an Elementary School.
Guest Speak Program - Practicals of getting a guest speaker and how to outline your time.