Slow down ?
Studded tyres for the snowy icy conditions, otherwise seldom have trouble with the 23c's on the fixed, even on icy frosty mornings well below zero. Read the road, manhole covers can be slippery, often are recessed and have raised edges which can catch a tyre, they also often develop deep potholes around the metal frame. Avoid puddles as they can hide potholes. Leaf mulch, I always give it way more attention than is probably required.
Boots for the cold mornings, went for years wearing the road shoes and moaning about feet getting cold, cycling boots with a good high cuff made a world of difference. Cycling longs go on the outside of the over shoes so the water drains away to the outside, not inside the boots.
Anticipate, indicate changes in road position well in advance of potential obstacles, show the drivers what you avoided, thank the driver when they
pass you (I'm more than convinced I now get far better passes). Brake early and gently, locking a wheel is when you're most likely to go over.
Clean the bike after every ride, clean the chain after a wet and dirty ride.
