Terro is very effective if you're not into making your own concoctions, but borax in syrup, as Campbell said, is really all you need. For areas where you don't want poison, corn starch is supposed to work. I've had mixed results with that though.
So, "no" to the nuclear bombardment?
I don't think poison and coffee are necessarily a great idea either.
Anyway, they seem to confine themselves to the powdered milk and sugar compartments, and I take neither.
Build a man a fire, and he'll be warm for a day. Set a man on fire, and he'll be warm for the rest of his life.