Just what you need right now-- another "Listicle."
There's no set number, but here's a chance for my fellow LitNutters to make a listicle of word-pairs which either give you trouble or irritate you when you notice that somebody else has chosen the wrong one. Here are a few to start off:
its/it's
you're/your
stentorian/stertorous I've got to watch myself from typing "stentorius."
reluctant/reticent They don't mean the same thing!
efficacious/effective Think "before" and "after."
"energizing"/"enervating" These are opposites.