Your and You're.

For anyone who understands grammar, this is one of our BIGGEST pet peeves.  The reason why it bugs us grammar-sticklers is because it's not that hard, at all. It's so easy to just put an apostrophe and an re. Since it's so damn easy to do, this obviously means that people literally do not understand when to use you're and your. So let's go over it.

You're is a conjunction. This means that it connects two words with an apostrophe. How I think about: When what I mean to say is you are, then I know to use you're because, obviously this is what you are means.  My question is this- do people even know that you're is just a simplified version of you are? So whenever you what you mean to say is you are, remember: apostrophe re. All you're doing is taking out the a in are and replacing it with an apostrophe to show that you simplified the two words into the conjunction you're.
You are and you're MEAN THE SAME THING.

For example: You're weird looking. This can also be said as You are weird looking.
Next is your which I find much easier to understand because if you're not trying to say you are, then you use your every other time. It's that simple.  The word your is a pronoun, in possessive adjective form.  Think about what this means- it is showing possession and modifying another word (which is what an adjective does.)
For example: Is that your car?  your is modifying car and showing possession.

I sort of feel like a weight has been lifted off my shoulders after finally ranting like that. It's really not that hard to understand and I pity people who can't get it straight.