If you want to improve your presentation skills, here's a very good collection of advice on how to give an academic presentation from Jonathan Shewchuck, a Computer Science professor at Berkeley. Even if you're not a CS guy, read it anyway - most of what he discusses is relevent to almost any presentation. He breaks down just about everything you need to know:
- How to make sure your slides are clean and crisp (less is more)
- How to organize the presentation (more time on motivation and less on technical details)
- Helpful advice on actually giving the talk (be aware of nonverbal communication).
So read Shewchuck's list here before your next presentation.