People understand information easier and retain it longer when things are explained to them using illustrative aids. Use this to your advantage. In every phase of trial, use illustrative aids: maps, timelines, photos, charts, whatever will help drive your point home.
Powerpoint works great for this. However, if you need to manipulate the illustrative aid in real-time, there is nothing wrong with an old school white board or a pad of paper on an easel.