Are these really glaringly incorrect?

Here's a few tips that most people know, but sometimes forget. Enjoy:

Here are seven simple grammatical errors that I see consistently in emails, cover letters and resumes.

Tip: Make yourself a little card cheat sheet and keep it in your wallet for easy reference.

You're / Your

The apostrophe means it's a contraction of two words; "you're" is the short version of "you are" (the "a" is dropped), so if your sentence makes sense if you say "you are," then you're good to use you're. "Your" means it b...