I'm no expert on NJ maps (yes, states are different due to many factors), but a useful skill to develop is to pick out the physical location of buildings, either in conjunction with maps or without.
I start by being aware of local histories, and asking myself where a house would likely be located and then looking for signs of them. In modern times, they tend to get bulldozed, but in the old days, they either burned or just settled in to the ground. They left signs like old foundations, lilac bushes, apple trees and the like. Get an eye for that. The advantage of that is that you bypass historical research and get right down to detecting. Don't get me wrong, research is great, but I stumble on old sites all the time and it's easy to just start swinging.