Choose the right words. Know what certain words mean and their correct usage. Consult a dictionary and thesaurus to know the correct usage of words and their synonyms and antonyms.
Match the tone with the language. If the piece of writing is a humorous essay, then use language that is witty and ironic. If the writing is an academic research paper, then formal language will be more appropriate.
Use direct verbs. For instance, write "dawdled" instead of "walked slowly" or "screamed" instead of "talked loudly." This will create writing that is more immediate and direct.
Be specific. Specificity enables readers to visualize what is being described. For instance, name the make of an automobile or the type of house: Acura or Victorian.
Don't be wordy or long-winded. Use language sparingly and be concise. Avoid redundancy, such as repeating ideas or phrases and using words that don't serve any purpose.
Avoid words that are too elevated or unfamiliar if they serve no purpose in the writing. For instance, say "secretary," not "amanuensis."
Choose words for effect. For instance, if a character in a story is a snobbish intellectual, use elevated words that will best describe the way this character will think and talk. If a character is uneducated or illiterate, then choose words that will best demonstrate his level of literacy. Alliteration and repetition can also be used effectively for a specific reason, such as to create rhythmic sentences or to emphasize key words for meaning.