Practice techniques used to serve as an effective expert witness In this final part of Mark Shirley’s litigation services series, the focus turns to practical tips for new and experienced expert witnesses. These include what to consider before engaging, how to organize the file, the need to understand the vernacular and preparation, as well as the need to understand the discovery process. Impressions are also shared with respect to the use and advantages of visual aids, and how to conduct direct and cross-examination testimony.