What's in your backpack?
Let's see, besides the essential tire pump and insulated coffee bottle, a brush to get all the snow off the tires and bike before bringing it into the building where I work. I'm surprised it took me this long to think of it. Years past, I'd try not to track too much snow into the building, but this year I worried about the amount of snow that can build up on the fat bike tires. Lightbulb went off, and I got a cheap brush to carry along. Good for home, too.