Serviced or not?

13°C, clear, pure sunshine

A few hours preparing the race bike for it’s first outing this year (tomorrow). My suspicion is, however, that it will be no better than last year despite servicing the gear levers at Campagnolo, stripping & re-seatting the headset bearing; after all that, it could be just as annoying to ride as it was in October.
One problem is that some jobs are necessary only every few years- like the headset. That’s enough time to forget the technical details- like the bearing size in the headset.