A good guideline is to have no more than 20 such points per section. Express each technical point as a declarative statement, substantiated with supporting material. Though the restriction to 20 points may seem like a hardship, it will help focus the audience's attention on the most significant information. The best way to present material in a limited time period is to use well-conceived visual aids. A good guideline here is to plan an overhead foil for each key point.
Visual aids simplify the presentation task significantly.
They both focus the audience's attention and cue you as the speaker. In general, each slide should have no more than five major supporting concepts. If yours have more, simply select the most pertinent. Remember that your visual aids are not a complete reconstruction of your manuscript. The full story appears in the Proceedings and visual aids are only attention-focusing cues for the highlights.