If your character has a pet, you can't forget about it halfway through the fic.
Eyes can be of colours other the 'bright blue' and 'emerald green'.
If you write a 200-word essay on your character's love interest's eyes, you're doing it wrong.
Not all females cut bangs, and not all men have short, shaggy hair.
You can't create a character who reads a lot and is very informed about stories and classics and wonderful things, but hasn't heard of Lord of the Flies.
YOU ARE READING
Tips For Writing Fanfiction
RandomExactly what the title says. (If you have questions, you can PM me. I'll try to help. Or, you know, take any insults you want to throw at me.)