Fred & Pete's in Hamilton is kind of the classic breakfast place in the mornings. It is open way early and isn't usually super crazy. Right on 33 in Hamilton. I've always had a good breakfast there and I really like the atmosphere.
I've heard that the cafe on Park street in Bordentown(right near the corner of Farnsworth Avenue) is pretty good, but I've never been and can't vouch for it at all.
Maybe Town & Country? I don't really remember being thrilled by their breakfasts though...
Or possibly Pat's Diner on South Broad Street? I've always had good food at night there, and my pickier friends seem to enjoy ordering their breakfast items.