How Should The Rehearsal Be Done For Making An Effective Presentation?

This is an important but least practised step in creating an effective oral presentation.  It helps to prepare the speaker for any potential problems with delivering the paper and eliminates embarrassing situations. Two important aspects are:

Practice:

Practice is an essential component of effective presentation. It must be done alone, using audio- or videotape. Once having reached a point of satisfaction, it may be done in front of a few friends. This allows the speaker to spot and eradicate the flaws in a presentation. It also enables one to work on making smooth transitions from section to section and provides an idea of the length of presentation.

Presentation posture:
Stand confidently on one side of the projection screen or blackboard, and closer to the audience. Do not stand at one point but walk purposefully in the room. Avoid standing behind a lectern or desk. During presentation face the audience, and use gestures.

I hope this will help you as I have tried my best to satisfy all the important factors that can help in making a presentation outstanding.