When I lived on my own, I slept with a very large carving knife under my bed, incase anyone broke in. Im not ashamed to say I would have used it had someone attacked me...thats what it was there for.
Now I'm a lot more confident, and could probably take most people when I get wound up. But the dog also sleeps in the room with me and gav, so if for some reason gav didnt wake up or whatever, the dog would have its go...even when me and gav playfight, as soon as he touches me, the dog goes for him...unless I tell it no...so yeah, Im pretty well protected at the minute.