Ambinder has some suggestions for journalists:
Study cognitive science. Figure out how minds work. Be suspicious about patterns and be knowledgeable about probability.
Don't be self-righteous. Journalists working for big newspapers, magazines, television networks, or websites are privileged to have the platform and should be humble about using its power.
Be humble about conclusions. This is not to say that you can't make them. It is to say that if your conclusions aren't provisional, then they probably are not correct.