San Juan: What's the best neighborhood in San Juan for a first time visitor?
Hi. I suggest you stay in the Condado area which is near the beach and lots of restaurants and bars. Some hotels in the area are: La Concha A Renaissance Resort, Condado Vanderbilt Hotel, San Juan Marriott...
Salem (Massachusetts): I will be staying a few weeks in Boston. Would you recommend Salem?
A one day trip to Salem is more than enough. Boston is a city with lots of things to do and see so you should spend as much time as possible in the city and surrounding areas. You can't miss: Fenway Park, Newbury Street, Cambridge, Faneuil...