Dr. Tushar Chokshi provides guidance on preparing and delivering effective presentations. He emphasizes that presenters should thoroughly understand their audience and have a clear plan for the presentation's content, structure, and visual aids. The delivery is also important - a presenter should speak clearly, make eye contact, and appear confident through their body language, facial expressions, and professional attire. Thorough preparation, including practice presentations, helps presenters feel relaxed and able to engage their audience.