Here are tips which could be useful for 

a) The Mary Sue Awards

b) Making sure that character is NOT a mary sue.

Names

First take a nice, unique; yet normal name.(E.g- Alissa) Then chuck it out of the window. Now, take some sort of over-used name. (E.g- Brittany). Now, take a word that rhymes with it. (E.g-Chuttney). Now, look around. Take a few random objects. (E.g- Apple, Book, Foot, Chair.). Tada!

Brittany Chuttney Apple Chair Footbook.

Now, think of some short form, which only their BFF and BF calls them. 

Britt Chitt Foot

Poof! You now have a Mary Sue name.

Hair

Take a normal color (E.g- Brown). Stamp the hell out of it and throw it away. Now, look around and take a color. (E.g- Red). Take another color (E.g- Violet). So, the person has Violet hair with red tips. 

It MUST be 

a) Shoulder length

b) Till hips

Appearance

Now, take a sensible height. Forget about it. Make your character short/tall. They MUST wear heels. Next, your character must be pretty. No pimples. No acne. No voice cracking. Nope. No puberty. 

Orbs

Take brown. Obliviate. Poof! What brown? Take some color. (E.g- rainbow). THEY MUST BE SHIMMERY AND MUST STARE INTO YOUR SOUL!1!1!1!

Clothes

For a girly girl: Black clothes, leather jacket, black boots

For a non girly girl: Skirts, dress and heels.

For a girl: itty bitty clothes.

AND GOD FORBIDE IF THEY ARE NOT STRAIGHT!!! OR IF THE CHEERLEADER IS NOT MEAN!!!

Go, enter TMSA (The Mary Sue Awards)!!!