When should you use "who" or "whom"? "Which" or "that"? You don't need to be a grammar geek or a professional writer to want to know. This list of common grammar mistakes can help you strengthen your writing for work and in your personal correspondence.
Jon Gingerich compiled this list of grammar villains on Lit Reactor. You're probably familiar with many of them already, such as the difference between using "fewer" (for things you can count or quantify) or "less" (hypothetical quantities). Grammar sticklers will be happy if people read this and stop saying "impactful" (because it's not a word) and confusing irony with coincidence.
While no one's advocating you become a grammar nazi, the shortlist is a great review if you want to tighten up your writing, as most of us, myself and Gingerich included, are guilty of having made these mistakes numerous times.
20 Common Grammar Mistakes That (Almost) Everyone Makes [Lit Reactor]