The main checks that we have found necessary are listed below;
Screws fastening the heavy duty aluminium bridge onto which the mast is stepped - check tightness. 
Screws fastening the mast step plate.
Screws fastening the transom rudder fixings
Screws fastening the thwart seat
Screws fastening the grip strip to the gunwhale
The furling mechanism needs an annual clean and lubrication
The mast top sheave needs cleaning and lubricating.
Do check the main halyard for signs of fraying. Any sign of wear cut it short, heat seal the end and replace the bobble. The main halyard is not tolerant of fraying and will snap without warning if these signs are ignored.