You're writing, you've got idea after idea flowing through your head, you've got to get a lot of these great ideas onto paper and communicate them to your audience. It's tremendously tempting to rush, especially when space is at a premium. But when you've got the most ideas and the least space is when you must work the most slowly.

One frequent mistake that is made by those in a hurry to get all of their ideas and information down is starting one sentence before they finish the previous sentence. In most cases, absent a semicolon or other exotic punctuation, a sentence will have one topic. Writing a sentence that intentionally contains two topics is challenging; writing a sentence with two topics that unintentionally contains two or more topics is a recipe for disaster.

Such a sentence will be disorganized, unclear, and, worst of all, not clearly communicate the ideas and information you've worked so hard to develop and collect. Remember, your audience doesn't know as much about your ideas and information as you do, so you must work with them very slowly and clearly. They cannot make logical leaps with the same ease that you can. If you do not walk them down your thought process and put your information clearly out there, they will not gain the understanding that you have.

Don't move on to the next topic before finishing the sentence you're already writing. One sentence, one topic.