Ok, new kitty litter. :)
I don't go out in conditions where I might get stuck somewhere else any more (retired), but when I'm parked in my parking lot, I put an old broom across the hood (bonnet) of my car with the handle sticking out a foot or so, so I can grab it and start pushing snow off the car. Then I can open it and get my snow shovel, but that's rarely needed. In icy-snowy conditions, I keep a can of spray windshield ice melter by my front door so it stays warm and the pressure stays up. I bring it out to the car with me. Four wheel drive Subie, so it gets me out of the crap once I get the car cleared off.
Now that I'm off the chain gang, I watch the weather and before anything snotty hits, I go out and provision up. The last week-and a half of below zero weather, I stayed in the house for a whole week.
(HINT: I goofed one day and had my car pressure-washed and it went well below freezing that night --no snow, just effing cold. The water from the pressure wash got injected into the locks and I had to go back in the house to get the windshield de-icer to even get the key in the keyslot.)
Terry