A.C.
http://www.redcrossblood.org/hosting-blood-drive
that link is for the red cross specifically but the tips on getting organized for a blood drive would work with any organization that is in your area. The procedures are the same for the actual process of donating blood anywhere you give (it's federally mandated).
http://www.redcrossblood.org/Missouri-Illinois that's the home page for your region. should have links and information also :)
Good luck and hope you get a great turn out.