There are a lot of resources you can review to help prepare for your presentation. Nothing beats a little practice, though! For other suggestions, see the books listed below or review some of the oral communication resources collected by the ISU Academic Success Center.
There are a number of books written on the topic of communicating scientific information. Many are focused on the written word to provide guidance in writing articles, dissertations, and books, but most of these have at least a chapter dedicated to oral presentations. The titles listed below are just a sample of the books you can find in the library on scientific communication.
Scientific Writing and Communication: Papers, Proposals, and Presentations, 5th ed. by 
Healthy Presentations: How to Craft Exceptional Lectures in Medicine, the Health Professions, and the Biomedical Sciences by 
A Guide to Oral Communication in Veterinary Medicine by 
Writing in the Biological Sciences, 3rd ed. by 
Oral Communication Excellence For Engineers and Scientists by 
How to Write, Publish, and Present in the Health Sciences by 
Communication Skills for the Biosciences by Check out these writing and oral presentation services provided by ISU's Academic Success Center
The Graduate College also offers resources and consultations through the Center for Communication Excellence
The library's collections and services are available to all ISU students, faculty, and staff and Parks Library is open to the public.
