Always an interesting topic.
A new teqnique that I've fallen into lately is to leave my 'chaotic' associative model intact, but extract and unparameterize the resulting body before linking it into other parts. In that way, if the chaos unravels my model will stay intact, yet I can still edit the original features and re-extract a new body if changes are required. In the right circumstances, this can be a life saver.
NX 5.0.3.2 MoldWizard