I think you have created a great example today on how to increase not only new, but return blog traffic. Revisiting and updating outdated content and republishing it is a great way to get existing users to come back to your site. I wasnt around Moz in 2007 when the first version of this post was published. If I was and remembered that content It would have been one more reason for me to check this post out.
Another simplified traditional traffic generation model for circuit-switched data as well as packet data, is the Poisson process, where the number of incoming packets or calls per time unit follows the Poisson distribution. The length of each phone call is typically modelled as an exponential distribution. The number of simultaneously ongoing phone calls follows the Erlang distribution.
When you're writing a blog post, keyword research is best utilized for the title and headline of the post. For example, if I wanted to write a post here on Moz about how to generate good ideas for bloggers, I might craft something that uses the phrase "blog post ideas" or "blogging ideas" near the front of my title and headline, as in "Blog Post Ideas for When You're Truly Stuck," or "Blogging Ideas that Will Help You Clear Writer's Block."
That's a screenshot of the AdAge Power 150, a list that's been maintained for years in the marketing world and receives an endless amount of discussion by those listed (and not listed). For example, why is SEOmoz's Twitter score only a "13" when we have so many more followers, interactions and retweets than many of those with higher scores? Who knows. But I know it's good for AdAge. :-)
Respect other websites. People get very annoyed when it's clear that someone is using their website solely to promote a different site. If you're going to blog walk, make thoughtful comments on articles you found interesting. If you're posting in forums, read the rules and participate in discussions. Don't post just to get another link to your blog out there.