... Practice in front of the mirror or camera (to replay it later and notice mistakes) Hire a coach or watch TED X presentations (learn from the best speakers) Attend small events dedicated to negotiations and debates (e.g. Toastmasters) Be confronted by friends (they can prepare simulated questions so nobody can surprise you later) Breathing techniques and non-verbal communication once I interviewed a voice coach for Slovak Forbes and she advised the following techniques/practices: practice non-verbal communication (upright posture ... ... adequate eye contact making grimaces (e.g., alternately