Most student halls have locks on bedroom doors, but the same can't be said for a lot of shared flats and houses. If you've got valuables, documents, or private possessions (like a diary) that you'd like to protect from prying eyes, consider stashing a Lockable Valuables Box (£25) somewhere out of sight. It'll also protect important documents from fire or water damage. Just bear in mind that it's not entirely safe from tampering: though it makes accessing things more difficult, someone could still steal the entire box!