Selected answers from the Dumb SEO Questions Facebook & G+ community.
Michael Martinez: I would either rewrite or replace an entire outdated post.As for posts that are partially out-of-date, I normally just revise the portions that need to be updated.Either way, you may decide to rewrite titles and other optimization hot points just to stay on top of contemporary search trends. People change their queries over time and the way people searched for content 10-20 years ago was very different from how they search today.
Abdallah Oubaki: Michael Martinez Thank you very much for your answer. I also believe that`s the best practice. Thanks again.