You may want to try "Presenting at medical meetings" by Jim A. Reekers (electronic resource) and "Beyond bullet points : using Microsoft Office PowerPoint 2007 to create presentations that inform, motivate, and inspire" by Cliff Atkinson (currently checked out, but normally you would ask for it at circulation). Both resources can be found through our catalog.
Also, you could attend Ryan Harris's workshop "Creating Effective Presentations Using PowerPoint", more information here: http://www2.hshsl.umaryland.edu/hshsl/workshops/index.cfm
Hopefully this helps,
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