Dry wicking layers first, then a cycling specific shell jacket that breaths in the right places like in front of your shoulders and arm pits. Wind resistant tights of any type you prefer is fine. Under shorts can be anything, I like padded cycling shorts. Wool socks, ski gloves and cover your head under your helmet (very important). All of this can be modified here and there depending on the temperature. I use 2 dry wicking under layers when it's in the 20's and only 1 when it's in the 30's. Other than that its the same everyday for my long commute. I do this because I spend 3 hours per day on the bike in very cold weather.

If your commute is not too long, and changing up when you arrive is an issue, then you don't need anything special like that. Just dress as you would if you were walking there and ride slowly.