The number one thing people want from Dragon NaturallySpeaking is good performance.  This means very accurate dictation at high speed.

If you have the right hardware, prepare NatSpeak properly, and speak clearly, then you should be able to dictate at over 120 words per minute at between 95% and 98% (or better) accuracy.  Really.  If you are not seeing results like this then something is wrong.

Here is a set of topics which cover a number of tips that should help yo get the best performance.
 
Start with a Good Sound Card
How Do You Know If You Have a Bad Sound Card
Does "Below Average" Mean My Sound Card is Bad?
What about Built-in Sound Cards
Get a Decent Computer
If You Really Want a Laptop
How to Talk to NaturallySpeaking
Make Sure the Microphone is Positioned Correctly
How to Get the Best Performance When Spelling
How to Spell While Dictating
How Much Memory Do You Really Need?
Tricks for Avoiding Repeated Errors
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