Thanks for the suggestions guys. Jimmy's suggestion of the "Grabbing the car door" method does work, but I don't like looking like a ninety-year-old-man holding on to the car for support as you get out. ( How vain is that ? )

Trumpy & Geoffs cotton clothing suggestion is sounding good. But down here by the Antarctic the polyprop clothes are cheap & warm. The ubiquitous polyprop long-john suit that is standard attire for most South Islanders in winter is probably a good static generator. I'll miss my polyprop long-johns, but if it means I get less static socks, I'm all for getting cotton.

Thanks to Pauluk for enlightening me on the conductive strip hanging from the back of cars. I never knew what that was!