Heidi Bourne, guiding teacher of Pacific Mindfulness, offers a good introduction to wise action and its role in a spiritual life. You can find her article here: Wise Action
Jake Davis provides a more detailed description of wise action, and especially the ways that mindfulness of our emotions and thoughts can help us to discover what actions are skillful and wholesome and those that aren’t. Learning to discern which actions will lead to our happiness and the happiness of others is the basis of wisdom. You can find the article at this page: What Feels Right about Right Action