A growing list of products I've used and recommend for specific problems around your home
Mold - Mold Killing Primer from Zinsser I used this in a client's bathroom and after 30+ days, no signs of mold. The mold was on ceiling and walls and was a result of keeping door shut during and after a shower. Though they have an exhaust fan, keeping the door closed didn't help. This product can be applied directly over the mold.