Animal Husbandry
A major contributing factor to the spread of resistant drugs is the widespread use of antibiotics in the animal food industry. To maximize profit we feed drugs to animals as a preventative measure, "just in case". We have no one to blame but ourselves for this mess, and the bugs keep getting smarter and smarter faster than we can learn how to fight them off. And then there is swine flu and bird flu, both viral, and the antibiotics don't do a thing against them.
Being vegan, I do my small part not to contribute to the problem. The side benefit is that I rarely get sick, and when I do, my body seems to make the illness rather mild.