Oh man, why couldn't you have said on my right? Then i'd at least have a pair of scissors!
As it stands, i have... picture frames, some fruit pastels, my keys, a glass, a few pc game boxes, some wires and books. I suppose i could smash the glass and hope one end of it is very jagged while the other is relatively unscathed; a makeshift 'broken bottle' that's popular in bar fights would probably be better than nothing. Alternatively, i might bring some wires along to bind zombies to a point to stop them chasing me throughout the house - think Silent Hill 4 when you pin ghosts with the Sword of Obedience. Not that that'd be practical, or easy to do, mind. Another alternative is to tie the wire on the keys and try to use it as a makeshift flail, but i don't think it'd be strong enough to do any real damage.