Great small neighborhood restaurant: La Provence Grill, Fabio the owner will take good care of you.
Great non-tourist club: Bardot, (3456 North Miami Avenue) off the beach, but the best place at the moment.
Best beach: between 2. and 3. Street (all the locals still go there).
Great sushi at Sushi Siam (55th street Station, also check out NightOwl, the only store that sells Donerix's straps ).
Best Pool: Still the Raleigh IMO
There is also a great watch store in Bal Harbor on the second level and the Italian restaurant at street level used to be one of my favorites (I lived in Miami for 10 years).
Great intimate Italian dining and upstairs lounge: Casa Tua (not cheap, but worth going, great cocktails), 1700 James Avenue