On sharp descents with cross-country skis I try to "pulse" my snowplow, as in: plow hard, let up, slide a little to one side, plow hard etc. That gives me better stopping power as I edge harder. Or I'll plow harder on one side, let up, then harder on the other side. It can resemble slalom turns. But on the icy stuff it's sometimes better to just push through, especially if it's narrow, and look for softer patches to snowplow on.
If I find myself picking up a bit too much speed towards a turn crouching down and dragging the inside pole gives me just a little bit of added balance and control. Maybe it's just in my head, but it does work :-)
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett