The only things I have to add is
Peroxide - if you don't use it on wounds, or have decided not to. Keep it because it will kill most blood born illnesses, so you can use it to clean up blood horse/human off of surfaces during clean up. Also you can use it to take blood out of clothes/towels/blankets and such; dip the item in peroxide then use a toothbrush dipped in baking soda to scrub out the stains.
Flour - what a great idea!! But I'd stay away from a self rising flour since it contains yeast, but a regualar flour wouldn't contain the yeast and would be a good idea to use like Liberty Valace explained.
Great list everyone, there are things I'd like to add but I've got to run out and get the names of what I use. I'm horrible and product names. Lol