I find these actionable as well: O - "Don't modify, extend instead." I - "Don't group interfaces into a god object - separate them." D - "Depend on abstracti

I find these actionable as well: O - "Don't modify, extend instead." I - "Don't group interfaces into a god object - separate them." D - "Depend on abstractions not concrete implementations." S is the most disputed but Uncle Bob occasionally clarifies (paraphrased, again): "Object definitions should be beholden to only one stakeholder group." SOLID seems actionable enough to me... whereas Holub's article is a bunch of fluffy mothering statements.