Some techniques of good storytelling are having an aspect of surprise, using conflict, adding a personal touch and making a vivid presentation. These techniques make the story entertaining, memorable and authentic.
A good storyteller should use an element of surprise in his stories. A story that is predictable is usually boring, while one that has a twist, either good or bad, keeps the audience immersed and enables the storyteller to stand out from the rest.
A good story is based on a conflict that the protagonist tries to overcome. This keeps the audience engaged as it tries to unravel how the hero overcomes the struggle.
A good storyteller creates mental pictures for the audience. This is accomplished by focusing on the setting of the story and engaging the senses. Focusing on the setting enables the audience to visualize the "where" and "when" of the story, making it more interesting and memorable. Incorporating all the senses by describing what the main character saw, heard, smelled, tasted and felt makes the story appear real.
The use of props such as drawings helps in storytelling, and facial expressions and gestures make the story memorable for the audience.
Adding a personal touch by using a normal voice and showing emotions makes the story appear realistic.