Each literary medium deals with the concept in their own unique ways. For books there is only one thing to focus on and that's the writing. All you have to do is make sure that you writing demonstrating what you're trying to get across and not simply telling them. It takes some practice and thought but its not difficult once you figure out what you're doing.
Movies/tv, on the other hand, provide the easiest way to get this concept right, considering the nature of that particular visual medium. All you need is good actors, talented writers, and a director who knows how to work with them. Good actors can use their facial expressions, body language, and vocal tones to convey much more than just what they are saying (or not saying as the case may have it). Here is a simple example of this rule put in action: