For clarity, it is also important to keep a check on the sentence length. If sentences are too short, your writing will sound immature; if they are too long, the reader will lose track. Sentence length, should therefore, be not too long and not too short. A skillful writer can produce much longer sentences which remain clear and effective. Some topics and some tasks may tend to require longer sentences. What is important is not that you count up every sentence, but that you think about sentence length when writing, monitor your own writing to ensure that the meaning is always as clear as possible, and explore opportunities to vary sentence length when appropriate. Short sentences aid coherence, whilst longer sentences aid cohesion.