And drive around the island. Wear beach clothes - spend at least a couple of hours at the inland beach from Orient [NOT orient]. Take the road to orient, but do NOT turn at orient, keep going straight and you come to a hurrianed out wreck of a hotel - drive around to the left and there is a wonderfully protected beach area, great sand and warm water and a great view of the mountainous part of SXM across the bay.
This beach had no name the last time we were there but it was very very pretty and not exposed to the rough atlantic surf, AND had a place to rent windsurfers and boogie boards and a decent restaurant. That, and all the naked 50 year old nudists were not present, but it had lots of trim and fit topless europeans.
The rest of the day - well, in the morning I would go to Marigot shopping, the place is closed from 3-5 every afternoon, maybe that has changed but the last 5 times we went to SXM the place was closed up tight in the late afternoon for siesta.
Next, the best jewelry shopping in the Caribbean is in Phillipsburg. . .