We were discussing this in the TTC thread, so thought I would add this handy little hint in here as well We were once told to cut up an onion, put it in a bowl of water in the room you are painting and it will help to keep the paint fumes down. It is suppose to suck up the paint smell.
My DH use to be a painter (years ago) and he had never heard about the onion thing so was skeptical, but we tried it and it worked for us.

Nic