The book Growing Object Oriented Software, Guided By Tests does a good job explaining how to avoid the "missing forests for the trees" problem. The short summar

The book Growing Object Oriented Software, Guided By Tests does a good job explaining how to avoid the "missing forests for the trees" problem. The short summary is to use integration and unit tests in tandem, which keeps you focused on the entire feature while also developing carefully tested units. The book explains it better than I do.