Find a local who can give you directions, and if you're lucky, a tip on a pub.
Stick out your wand. Night Bus knows the way.
Consult a travel guide or map. It's what they're for, after all.
Quidditch pitch. Somebody's always up for a pickup game.
Great Hall. There's plenty of food and gossip.
Room of Requirement. It's always the best place to be. (But if it gives me a desk, parchment, and quill, I'm leaving.)
A friend's advice
Hang out in my House's common room.
Explore the castle.
Fair and decisive
Understanding and honest
Intuitive and determined
When opportunity knocks.
In familiar territory.
Where you can make a difference.
A survival kit.
A friend to be stuck with.
A hammock and possibly something to drink.
Work in a group with various strengths.
Work with people you know well.
Making a decision.
Before a decision is made.
After a decision is made.
Interesting, but ultimately irrelevant.
Windows to the subconscious.
Harry Potter, of course.
Hermione Granger, obviously.
I care less about the Minister of Magic than I do the new head of the Order of the Phoenix.