Recently when I communicate with people in various languages, I started to notice that people talk too much. They repeat themselves may times using different words, often speak about unrelated things or completely off topic. Sometimes it takes 5-10 minutes to discuss something, which could be discussed 2x faster.
When you need to communicate to others, make sure that you know your subject and what you want to say. Don't let others sit and think: “What does he really want to say?”