Winter running - tips, tricks, advice?

I used to run outdoors in the winter, but after getting a bad ankle sprain on black ice last year, I'm strictly a treadmill person when there is snow and ice.

However, I do walk and cycle (with studded tires) all winter, and my best tip from that is LIGHTS. I have LED snap bracelets like these ones that I wear on wrists and ankles to increase my visibility, along with reflective clothing, an LED collar for my dog, and clip on safety lights like these ones that I can attach to my backpack or zippers or whatever to ensure I'm seen.

It's only light from about 8:30 AM to 4PM where I live right now and so it's really important that traffic notices me. I also wear exclusively neon gear for the same reason.

When it's very cold (below -20C or so) I will wear my ski jacket, because it has armpit vents if I do heat up enough to need them. I also layer fleece lined tights with thick sweatpants to trap some heat. Mittens, not gloves so my fingers don't fall off. And I cover all the exposed skin on my face so frostbite won't set in if I'm out for more than half an hour.