The library has a lot of resources for improving your presentations. Some examples from both the JD campus and digital collections are included below, but even more can be found by searching the library collections for business presentations or communication in science. Use the EBSCO password if prompted for one.
Study and Communication Skills for the Biosciences by 
Develop Your Presentation Skills by 
Ethics and Practice in Science Communication by 
DK Essential Managers: Presenting by 
Ready. Set.
Gulf Coast.