...know the difference.

Know your source.

• Know when you're dealing in opinion rather than objective fact.  Opinion can offer us constructive guidance, but it's not fact.  If you'd like to share opinion about the topic, feel free to add a section on brainstorming or wisdom, both the legitimate territory of subjectivity.  This doesn't mean that opinion is inferior to fact, just different.  Opinion can be a great source of wisdom and integration of ideas.  Opinion can guide fact.  But opinion is not fact.  (See our Village Square 101 discussion on mythos vs. logos for more incredibly astute observation on this topic.)
• Some sources are more credible than others. 
  • Email is never a source unless you can locate a credible source the email came from (and that does not include your Uncle Bob who hasn't lied to you yet)
  • Online "news" sources are often not news so proceed carefully
  • Blogs can be credible sources but often are not

Use references whenever possible.

Share where you got info with other readers when possible so we can know your source too.