The Data by Subject guide lists data resources appropriate to specific academic disciplines. It will continue to expand over time as new subjects are added.
Currently, pages are available for:
and the special topic of Event Datasets for Global Affairs.
See Data Services for an overview of data resources offered by Rutgers University Libraries.
It is difficult to outline a general strategy for finding data because so much depends on the topic of interest. But here are a few starting points:
And don't forget to consult the Data Services guide for additional information.