The period acts as a stop sign. Any word next to the period plays jazz. Observe word territory. Do not repeat a key word without a given space, unless you intend a specific effect. Play with words, even in serious stories.
Details help readers see the story.
Make word lists, free-associate, be surprised by language. Strive for the mythic, symbolic, and poetic. For clarity, slow the pace of information. Short sentences make the reader move slowly. Time to think.