1. Nodody excpt Hermione has read Hogwarts A History.
2. Prof Binns doesn't seem to notice that most people sleep in his lessons.
3. Don't wander somewhere with Harry in the final scenes of the movie.
4. Hearing Voices In The Wizarding World Isn't A Good Sign.
5. Ghosts are Transparent (taken from Harry when Snape asked Harry to describe ghosts)
6. It's not a good idea to eat Chocolates you found on the floor.
7. Never sit under the Whomping Willow.
8. Peter is a better rato than human.
9. Don't follow the spiders!
10. Arguing with Professor Umbridge in class will earn you a bolacha, biscoito from Professor McGonagall.