Learn why showing is preferable to telling. Showing, as the word implies, involves writing so a reader can create an image in her mind from the words printed on a page. Anything that distracts from the flow of the story interferes with this process. Narrator commentary is an interruption. Too much exposition interrupts a story that could be a gripping "page turner" if it weren't for the boring bits.
Choose words and details that represent the ideas and meaning you want to share. Use descriptive language, vivid imagery and dialogue that convey meaning and feeling. Include details. Write with the visual aspect in mind. Describe what a scene looks like and how the characters move through the scene. Include the characters' actions, and consider what those actions say about them and their intentions. Also include the way they speak and their accents, and think about what they say or don't say shares about their character and the story. Present less of a character's thoughts and more of his actions.
Write the narrative so it flows without intrusion. The narrator should present the story in a manner that allows the reader to come to an understanding without having it imparted on her. The reader wants to participate in the story by interpreting actions. Telling the reader what the character thinks and feels is frustrating for the reader. Present the character and story to the reader and let her draw her own conclusions.
Include verbs, and avoid adverbs. Adverbs are words that modify any word type except for nouns. Often they end with "ly." Examples include strangely, quickly and happily. Adverbs may weaken your text. They offer a poor alternative to stronger, more descriptive words. Opt instead for specific, descriptive verbs and nouns. For example, substitute "climbed awkwardly" with the more vivid and descriptive "clambered." This approach challenges you to expand your vocabulary. Do this naturally by reading a broad range of materials.