Get up to around 100 or so and slam on the brakes and come to almost a complete stop but don't stop and then do it again and then drive for about 5-10 miles with no stops and then see if it's any better.
Thanks. That was basically how I broke them in, though I did 55 down to 5 as quickly as I could 4 or 5 times. The roads around here are not snow covered anymore, but you never know when you'll find a slick spot.