Top 3 Kitchen Hygiene Tips

1. Microwave sponges for two minutes to kill germs and bacteria.
2. Rather counterintuitively, wooden cutting boards are less likely to harbor harmful organisms than synthetic ones. In either case, clean with a bleach solution once a month or so. The new "squirtable" bleach is great.
3. Several sources indicate it is not advisable to use any type of "antibacterial" soaps. Without exposure, your body can't build up resistance, and so you could be more likely to get infected.

Bonus: Baking soda is my best find for cleaning, especially for coffee-stained cups and water spots. Nothing I've found works as well.