jimbeetle - 4:50 pm on May 31, 2013 (gmt 0)
Verify before using.
Absolutely the most important point to be made.
There is a lot of misinformation to be found about SEO. You have to read with a very, very critical eye, even when reading the best known folks. Nobody gets it right all the time and their interpretations might not be the same as yours. The Internet makes it very easy to track down source documents or quotes and there is no excuse not to verify a statement or fact.
And always keep in mind that folks might have differing agendas than sharing information. They might shade the facts a bit to better market their services or tools.
Just yesterday the president of an Internet marketing company published a post in which he quoted a person as saying such and such. The person never came close to saying such and such, it was just the writer's bit of self-serving interpretation. Verify. Verify. Verify.