Be a boy scout and be prepared, leave earlier than normal, as well as plot a safe route away from busy streets and bus routes, this is for your protection and personal sanity.

Use a good rear flasher!! Invest some money in a bright front facing light. Keep your lights clean and carry extra batteries (the boy scout thing again).

Run lower than normal tire PSI in order to increase the tires' contact patch (don't forget a spare tube, and pump).

Lube your chain, keep braking surfaces clean.

Ride slower and less aggressive than you would in the summer, use fluid movements, brake earlier and softer than in the dry, keep the bike straight up and down when braking.

Focus on pedaling in soft and smooth even circles rather than short powerful strokes. When accelerating or climbing avoid putting excess weight on the front end of the bike, instead try to remain neutral.

Give pedestrians and cars more room, also remember that most pedestrians and drivers aren't looking for cyclists this time of year, so assume they don't see you.

Invest in some good thermal tights, booties, and gloves. Layering is key in cold weather. For instance, a thermal top (short sleeve), arm warmers, jersey, a thermal jersey, then a wind barrier on top.

Always ensure to carry a wind breaker, either a vest or a jacket. They are light and packable, and keeping the wind out is 80% of staying warm.

Don't forget the balaclava or thermal cap for under the helmet. Yes, a helmet.

If you see a fellow cyclist in peril stop and help, Karma pays back in bucket loads. It sucks to have a mechanical problem and have other commuters use you as a chicane. We're all in it together.

Finally visualize beaches surf and sun, and have fun. Smile and wave.