Short, efficient sentences are easier to read. To get really concise, try the Hemingway Editor, an online editor or a Desktop package ($19.99) that will make your prose as linguistically efficient as the renowned author’s.
A few pro tips for trimming down the word count:
“That” is a word that you do not need. Take out the second “that” in the previous sentence, and it still makes perfect sense.
No need to use multiple syllables or extra words when one will do. “Utilize” → “Use.” “In order to” → “To.”
Be spartan with your adverbs and adjectives. Too many are distracting.