A subject near and dear to my heart - and a constant source of annoyance. Lately I have been trying some things that seem to be working for me. I offer them here as a work in progress because they seem to work so far, but I haven't gone through an entire year's cycle of climate in my hobby room.
One: I have a dedicated air filter that filters dust particles out of the air. I situate it such that it exhausts (cleaned) air toward the mouth of my spray booth from 18" away.
Two: I start the blowers in my spray booth several minutes before I start to paint.
Three: I have a small humidifier that generates moist air that blows into the air filter. Static electricity is greatly reduced as humidity increases. Cold weather generally results in drier air and therefore more static electricity.
Four: Before placing the work in the booth, I go over it slowly with a Zerostat (here's a link to it - not shilling for Amazon, just showing the product:
http://www.amazon.com/MILTY-ZEROSTAT-AN ... B0033SHDSS ). After using the Zerostat I gently dab a tack rag (from your local paint store) on the surface of the work to pick up any dust or lint. The Zerostat does not necessarily cause the dust to fall off, but it stops the dust from clinging. Having used the Zerostat on the work, it seems to keep further dust from landing. I also give a once-over to the spray booth itself before painting. I have a PVC rest that I put my wrist on when I spray and I have tested that with a bit of aluminum foil - foil attracted to it before Zerostat, neutral afterwards, so I know it's working.
This set of steps increases the workload a bit. Getting dust on the work, and any remedial work to remove / repair it is far more work in my experience.