Studded tires help alot, lower tire pressure. Don't lean into turns, anticipate stops and scrub speed with the rear brake on downhill sections. If you feel yourself going down and cannot save it, kick the bike away and try to roll on the pavement if possible - platform pedals will make distancing yourself from the bike easier in the event of a fall.
The only time i was significantly injured going down on the bike (not ice related) was when i could not instictively distance myself from the bike, as my hands were tethered to the bars while using bar mitts. I tore my shoulder AC ligaments badly from the impact. I have learned to keep the bar mitts at home unless temps drop well below freezing, and am extra cautious while riding if i do use the bar mitts.