Whenever possible avoid using a Lectern when speaking in public. I know that it's a great place to hold your notes but it also serves as a barrier between you and your audience, which can make you appear more distanced and separate from them.
Additionally, since it blocks the view of much of your body, your audience is unable to 'read' much of your body language, making it far more difficult for them to determine your credibility and, therefore, the believability of your message.
The more open you appear the more they will come to trust the message you are delivering. This is a lesson Nixon learned (belatedly) in his first on-air debate with Kennedy, but one you can begin using immediately to up your presence whenever you speak in public.