If you have ancestors from New York (formerly New Netherland), you may wish to consider joining the New York Genealogical and Biographical Society. Members have access to the complete set of the NYG&B Record. That's 140 years of articles and primary sources for New York families!
There is other unique data online for members. For example Book One of the 1855 New YOrk State Census for Ward 17 of New York City is online and indexed in the E-Library. The rest will be added as completed.