This has most likely been done 2938492384893 times before.
Apparently, it hasn't worked.
I'm going to do it so people who look at my submissions see it.

There, Their, and They're
This is probably the most often confused of all of the things to be confused.

There: At that place, in that place. Has to do with place. The location of something.
          Example: Are you going there tomorrow or friday?
          Example 2: There is a pencil on that desk over there.
Their: The possession of someone. Belonging to someone.
          Example: It's their favorite ice cream flavor.
          Example 2: The board won't give up their money easily, it's theirs and they want to keep it.
They're: This one is simple. They are. If you can put "they are" in place of the form of there/their/they're, you can also use "they're". Grammatically speaking, this must refer to more than one person, but if I don't know someone's gender and I need to tell someone something about the person in question, I will say "they're" in place of she or he is.
          Example: They're going to the park too, do you want to come?
          Example 2: They're like tigers when they're angry.

Here and Hear
Here: At this location.
          Example: Here is a cupcake for you!
          Example 2: Stand here, I'll take your picture in front of this.
Hear: Using your sense of hearing. Use your ear to gather sound.
          Example: Can you hear that too, or is my ear just ringing?
          Example 2: Tell me if you hear a loud crashing sound, as if the house imploded.

Were, Where, and We're
Were: Past tense of 'are'.
          Example: We were there yesterday! (Instead of 'we are there yesterday', which wouldn't make sense. However, 'we are                          there' by itself would make sense.)
          Example 2: Were you at the park on friday? I think I saw you.
Where: The question word when asking about location. Something in the location of something else.
          Example: Where is the metronome? I keep skipping beats.
          Example 2: It was where the pencil was before.
We're: We are. Anything you could have "we are" instead of the were/where/we're, you would put "we're". However, it sometimes doesn't make any sense. You wouldn't say 'yeah, Damon is where we're right now!' instead of 'where we are right now!'.
          Example: We're going now! Be back at 6!
          Example: Yeah, me and Julie are going. We're super excited.

's and s
This one is relatively different from the other ones.
's: A posession, or a contraction.
          Example: It's (it is, contraction) Gary's (posession) favorite color, too!
          Example 2: Melanie's (posession) dog is a grayhound.
s: General ending. Plural of something.
           Example: Give me some chips, too! (For the love of all or no deities, DO NOT PUT CHIP'S or anything else like that. That                        is incorrect and probablythe MOST ANNOYING OF ALL POSSIBLE TYPOS.)
           Example 2: He isn't a good kid, because he skips school.

To, Too, and Two
To: Where you are going. Directed at.
           Example: Are you going to the mall tomorrow?
           Example 2: Hey, give that to him!
Too: In addition, as well. more than you need
           Example: Hey, are you coming too?
           Example 2: Stop! You're going too fast! You're going to--- I told you!
Two: The number 2.
           Example: Give me two pieces of gum, please.
           Example 2: Example two.

Your and You're. Thank you, deli73123!
Your: In posession of you, it is yours.
           Example: Is this your seat?
           Example 2: Get your books out of my spot, please.
You're: You are. Anything that can be 'you are' can be 'you're'.
           Example: You're being a huge jerk!
           Example 2: Hey, you're going to be there too?

Alot vs. A Lot
A lot: A large quantity of.
          Example: Wow, you have a lot of cats.
          Example 2: There are a lot of people who put these words together when they shouldn't.
Alot: NOT. A. WORD.
          Example: None, because ALOT ISN'T A WORD!

A rather different one: A and An. Thank you, prettywaters! And thank you for the correction, thatcobblestoneguy!
A: Used before a consonant sound.
           Example: Give me a second, will you?
           Example 2: Hand me a napkin, please.
           Special Example: A university. The 'u' makes a "yuh" sound, which is consonant-like.
An: Used before a vowel sound.
           Example: That's an awesome dress!
           Example 2: If you stop by the store, grab me an apple or two, will ya?

And a special one from a post I saw before: Generic and Cliche.
Generic: Normal. Not name brand (haha). Basic. General
          Example: Yeah, it's just your generic, every day case of ninjas breaking your windows and flooding into your house.
          Example 2: A generic aspirin-like thing.
          Example 3: That's just a generic house spider. I don't know what specific kind it is, but they're everywhere.
Cliche: Overused to the point of being annoying. Overused to the point of being used in comedy movies. Something that shows you have not creativity.
          Example: On my roleplay server, having two different colored eyes to be "special" is very, very cliche.
          Example 2: In any warriors roleplay, names including "eclipse", "snow", and "shadow" are so cliche, you can find at least                      two in a clan, and probably at least 5 loners with those names.

The above special one is very similar, so similar they might be gramatically the same to many people. In my eyes, however, they are not the same.

These are just a few main ones that I here... I mean, hear on my servers all the time. I do know how to use all of these correctly, no, I did not just look up what they mean to get diamonds and cool sparkly stuff. I did this to save myself from the bombardment of "We we're there too! Look over they're! Come hear!"s.

Please suggest other things I should add to this!

Diamond if this was not annoying, favorite if you liked it more than the 2938492384893 others, and subscribe if you like warriors and/or want to see my other stuff.

Also, I feel like this has everything to do with MineCraft, considering that I made this because of people with atrocious grammar on my server.

I FEEL LIKE THIS IS REQUIRED. IT ISN'T THE MAIN POP REEL, BUT THIS IS THE FIRST ANYTHING REEL I HAVE EVER BEEN ON. *_*

Yay, I caught it on the pop reel!