From the introduction to a great list of common errors in English (Paul Brians).
The concept of language errors is a fuzzy one. I’ll leave to linguists the technical definitions. Here we’re concerned only with deviations from the standard use of English as judged by sophisticated users such as professional writers, editors, teachers, and literate executives and personnel officers. The aim of this site is to help you avoid low grades, lost employment opportunities, lost business, and titters of amusement at the way you write or speak.
Some examples that make my skin crawl: being that, based around/based off of, and bias/biased.
I played hooky to go see Wild Robot this afternoon, so I went back to…
I first started teaching with this handout in 1999 and posted it on my blog…
In a hole in the ground there lived a hobbit. @thepublicpgh