Something I read here or in another forum: get a breeze box fan and fasten a permanent furnace filter (Home depot carries them) to the intake side. Run this for about an hour inside the room before painting. It works, even if I haven't dusted and vacuumed the work room for awhile.
Another thing that helps, especially in the colder, drier months of the year, is to keep the relative humidity between 50 and 60 percent, or at least as close to that as you can.
Absolutely run the booth for at least fifteen minutes before starting to paint, then mist the air in the room, wait a few minutes, then paint. Turn off the booth as soon as you are done cleaning the brush, and cover the model until it is tack free.