Your exit is as important as your entrance. Too many inexperienced speakers bolt from the podium immediately after saying their final sentence. This will put a whole new meaning on a presentation that appeared confident up until the last two seconds. Walk slowly and confidently away from the spot that you made your speech from. Eye contact is vitally important at all three of the above stages of your speech.
Many speakers tend to have a bias towards one section of the room.
Make sure that you make contact with the whole room at different times during your speech.