I Don't Need To Document Those I Already Know About
Research the complete family and always look for neighbors. The Abraham Chaney on this 1830 census was an uncle who I had located in later records in Illinois and for a long time I neglected to find him in the 1830 census because "I didn't need that."
Locating him in 1830 caused me to discover Sarah Crow living nearby--his one sister I had never been able to find. Researching the siblings "you know about" fully in records "you don't need," may give you clues on the ones you cannot find.