Reminiscing about my own carpet cleaning injuries I would go with an aloe vera tube for severe burns like the one I got when my auxillary water line whipped across my chest while filling a jug, and definitely a sewing kit for those gashes from things like hose clamp tails sticking out on hose reels that the installers left hanging out there in the open like razor blades. I didn't bleed out but close. Oh, and a set of crutches comes in handy for those nasty sprains coming down wooden staircases with wet shoes trying to carry too much crap. And who can forget the Advil from when Mrs. Jones insists you move every stick of furniture in the house.
That reminds me, I need to look into disability insurance.