Here are a couple of things we did at a manufacturing plant I worked at:
1. Had employees come in and go out through 1 or 2 entry ways. This way our maintenance crew only had to make sure those entryways were always cleaned off. If it was continuing to snow, sleet, freezing rain, etc. it was hard for them to keep up with all of the different entryways we had. We did have them go around to all the entryways, but spent the majority of their time on these few entryways that we had identified.
2. We had a discussion with employees about proper shoes to wear during bad weather. Seems like a common sense thing, but I have learned over the years that common sense has different meanings to different people! Although there are no magic shoes to prevent you from failing on ice, wearing boots or shoes with treads do help! It is amazing what I saw people wearing in the middle of snow and ice storms!!