If you can’t sell your idea or talk about your design with a client, it’s a lot harder to do your job well. As designers, we often have to present our designs in front of a large group of people. But as we progress in our careers we may have to do even more public speaking, such as giving an inspiring speech about the importance of design to business people. That’s a lot more difficult. It seems that most people do not like public speaking, no matter what level there are at (managers included). Here are a few links that contain tips on presentation skills:

Learn to Wow ‘Em Like Steve Jobs
Presentation Zen