Here's Yet Another Bad Practice That Makes Me Wince Every Time I See It:
when people use setup as a verb, when they should write set up -- two words.
Other things are similar, but not quite as ubiquitous. E.g. "everyday", as in the ridiculous "floss your teeth everyday".
And WTF is up with "albeit"? Last Saturday was bizarre. I read like half a dozen articles (both on line and in print) in a row, and every single one used the word "albeit". The RNG in the Matrix needs a good thump, or something.