Compress what you mean into the fewest possible words. Don't tell your readers what they already know, don't need to know, or can infer. Unfortunately, we can inflate our prose in so many ways that it is impossible to list them all, but the following suggestions should help you find the most common types of wordiness. Many pairs of words imply each other.
Finish implies complete, so completely finish is redundant.
Redundant Categories Specific words imply their general categories, so we usually don't have to state both. We know that time is a period, that pink is a color, that shiny is an appearance. Some modifiers are delaying tactics that we use almost unconsciously. Stating the Obvious Often we needlessly state what everyone knows or can infer from what we are writing. Sometimes we provide irrelevant details or more information than readers need to know.