If it were my bike, I'd get some wider tires (if the bike will accept them-Armadillos are fine & in my experience less comfortable, but more puncture resistant than Gatorskins), a set of fenders (if nothing else, at least those raceblades or whatever they are called), some lights if you will be out late, pedals & a rear view mirror, raise the stem so you are a bit more upright than on the bike (if you feel that the current set-up is too 'racy' feeling) & then ride. You may want a seatpost mounted rack to carry a light pack with a change of clothes, etc, but your ride should be good enough for the time being. I rode a racing bike to work as one of my first commuters & it was fine. Not ideal, but certainyl good enough.