[aaronchall]

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.