The computer recognizes speech most accurately when it can hear each word distinctly. To understand what it means to speak both clearly and naturally, listen to the way newscasters read the news. If you copy this style when you use Dragon NaturallySpeaking, you should see an improvement in how well the program recognizes what you say. Make it a habit to say each word clearly when you talk to the computer. In conversation with another person, its okay if you leave out a word here and there.
People are good at filling in the blanks in a sentence.
Unfortunately, the computer is not very good at this. If you leave out words, Dragon NaturallySpeaking also leaves them out. Another thing people do well is ignore all those ums and ers that show up in conversation. But the computer has no way of knowing which words are unimportant, so it simply transcribes everything you say. Make it a habit to avoid leaving out words or making extra sounds.