So it's time to get your bike down to your favourite local bike shop - LBS - for its start the season service.
Please, don't be that person who turns up on the first sunny/warm day in March and demands their bike be ready for their first Double Century which "is tomorrow ..."
No. Get your bicycle serviced in plenty of time so that mechanics can apply a little more attention to your favourite rail, point out issues, order parts, suggest upgrades, while they still have a little quality time to attend to your needs.
Declaration: I work in a LBS ...