#1: Give it a good cleaning! Ice and slush can easily build up on moving parts in your bike. It's a good idea to clean it out and not let it collect.

#2: Say goodbye to your fender. A full fender is great in rainy weather, but as soon as it freezes,they just get jammed with snow, causing you to stop randomly and have a hard time pedalling. A small clip on fender works fine though, just not a full coverage one.

#3: Stud those tires! Studded tires help you keep your grip so much in the winter, it's probably one of the first things you should do.

#4: Winter brakes. With slippery surfaces and cold weather, normal brakes can sometimes fail. Consider getting some winter specific brake pads.

#5: Light it up. A snow storm can roll around at any time during winter, so it's always good to have some bright lights in snowy weather where visibilty is limited, so that you can see where you're going, and other people can see you.