Now I will give you seven rules to follow which, if you memorize them and follow them as a daily habit, may bring you top-rating as an ACCURATE THINKER.

1. Never accept the opinions of other people as being facts until you have learned the source of those opinions and satisfied yourself of their accuracy.
2. Remember that FREE ADVICE, no matter from whom it is received, will bear the closest of examination before it is acted upon as safe, and generally speaking this sort of advice is worth exactly what it costs.
3. Alert yourself immediately when you hear anyone speaking of others in a discourteous or slanderous spirit because this very fact should put you on notice that what you are hearing is BIASED to say the least about it, and it may be out and out misstatements.
4. In asking others for information DO NOT DISCLOSE TO THEM WHAT YOU WISH THE INFORMATION TO BE, because most people have the bad habit of trying to please under such circumstances. Well measured, tactful questions can be of great benefit to you in THINKING ACCURATELY.
5. Remember that ANYTHING WHICH EXISTS ANYWHERE THROUGHOUT THE UNIVERSE IS CAPABLE OF PROOF, and where no such proof is available it is safer to assume that NOTHING EXISTS!
6. One of the great inexplicable miracles consists in the fact that both truth and false-hood, no matter by what means they may be expressed, carry with them silent, invisible means of identifying themselves as such. Therefore, remember this truth and begin developing the necessary intuitive faculty to enable you to “sense” what is false and what is true.
7. Follow the habit of asking “HOW DO YOU KNOW?” when anyone makes a statement you cannot identify as true. Follow this habit faithfully and you will see many persons squirm and turn red in the face when you insist upon a direct reply.
The most ACCURATE THINKERS are the scientists. They investigate with open minds and never allow their WISHES TO BECOME THE FATHERS OF FACTS, but deal with each fact as it is – not as they would like it to be.
Now, one final word of warning I feel I should leave with you: STUDY YOURSELF CAREFULLY AND YOU MAY DISCOVER THAT YOUR OWN EMOTIONS ARE YOUR GREATEST HANDICAP IN THE BUSINESS OF ACCURATE THINKING. It is easy to believe that which you wish to believe, and unfortunately that is precisely what most people do!
Source: Master Key to Riches Video Series. Film: Accurate Thinking. The Napoleon Hill Foundation.