Write concretely, instead of abstractly. Expressing your thoughts concretely gives the reader a clear picture of what you are saying. Then, think of how you would communicate that thought if you had to say it out loud. We tend to speak in a more concrete manner than we write. Imprecise writers use extra words and syllables.
Precise writers use fewer words to communicate the same ideas.
As you proofread, look for places to substitute one word for two of them or a shorter word for a longer one. Ask rhetorical questions. As you write, think of the questions that might be in the minds of your readers. Rhetorical questions encourage readers to continue reading because they want to know the answers. Personalize large numbers.