I find it interesting to learn new philosophical 'moves' or strategies that can be applied in a range of circumstances. Examples I've previously discussed include:
(1) Scanlon's strategy (in Moral Dimensions) for disarming the apparent significance of intent in moral principles (e.g. the doctrine of double effect).
(2) Arpaly's shift from explicit judgments to implicit, deep-rooted responsiveness (in assessing moral character, blameworthiness, rationality, etc.).
(3) Noticing 'Derivative Objections', e.g. when people object to consequentialism on the basis of paradoxes in axiology.
(4) The moves and countermoves available when theorists make use of certain idealizations or counterfactual conditionals in their analyses (potentially falling afoul of the "conditional fallacy").
What (more or less general) philosophical strategies do you find most useful and/or interesting?