Capitalization and punctuation problems are commonplace and need to be properly adhered to in any form of writing.
Likewise, a lack of attention to audience and purpose may pose significant problems in writing as well.
For instance, you may need to provide your reader with a bit of background information on a topic to provide clarity to some issues or maybe a particular objective, concept, or idea needs to be reiterated or further explained.
When these situations arise writers may become overzealous and provide too many events or happenings to try to better 'drive' home the point or likewise may give the reader too many facts or details on a subject in an effort to properly explain or 'define' it.
Among those is to slowly and craftily reveal to the reader the events and happenings of your story rather than blatantly stating them.
*For example, rather than tell the reader that a character in the story has an eating problem, reveal or show it to them by describing the character's physical features as well as providing a few scenes illustrating this condition; such as the character eating late at night, when upset, or overfilling a plate for dinner or in a restaurant..
In nonfiction stories you may choose to use foreshadowing by providing direct or indirect clues of the information that will be covered later in the story.
*For instance, in a personal essay you may start off by stating, "Our mothers are our examples" by doing this you are hinting to the audience that your essay will involve a story about how your mother was an example to you or something related to parenting and role modeling.
You can build suspense by including odd or intriguing details in the story that doesn't make much sense or seem to be very out of place (for instance, a full plate of food on a table when no one was home to prepare it).
Likewise you can also build suspense by allowing a character to undergo a near-death or life-threatening experience (for example a fatal car accident in which they were only saved at the very last moment when all hope was lost).