My best year as a commuter (stated about 5 yrs ago, extremely part time). I rode 80 days (of about 220 days in the office this year I figure) for about 2300 miles. Pretty good for me, and hope to improve next year. My total mileage is about 4200, so my road bike is starting to get lonely, given that it's generally used for long rides (60-100 miles).