Consult a book.
Wave your wand, say some words, and hope that you don't explode.
Shoot some awesome light at an orc.
Use your voice to control the mind of the person, then send your minions in to destroy them because they didn't say 'please'.
Shout "you shall not pass" at it and kill it.
Send your animal friends at it and shoot spells at it.
Drop its club on its head.
Stick your wand up its nose.
Wonder what it is, walk in, and kill the baddies that are there.
Grab some friends and levitate them up to the second story window to see who's dead.
Rush inside and search the house.
Walk in, ready to stun anyone in the house while trying to remember who was in the house.
Laugh to Voldemort and say: good job, old buddy old pal.
Ask it for a riddle.
Ask it what you need to do to get through.
Mock it, then when it pounces, turn it to stone.
Say: "this is my maze, bub!"
Try to walk past it, when that doesn't work, turn back.