The Lower Manhattan Cultural Council has tons of great resources here.
They also have great professional development programs here.
Creative Capital also has great professional development programs here.
I highly suggest entering the raffle of LMCC's Artist Summer Institute and Basic Finances for Artists (put yourself on the mailing list)
NYFA Source has creative jobs, residencies, grants, and resources
Check out NYFA Dr Hours
Nurture Art Also has a list of opportunities