Are you calculating your organisation's carbon footprint, with the intention of becoming carbon neutral, or does your organisation give time or funds to charity?
Actions like these should be incorporated into a sustainability strategy; they gain real power as drivers of organisational performance when seen as part of a broader strategic response.
What social, environmental and economic issues are important for your organisation? To determine these you need to understand your business, your industry and what your stakeholders think is important.
Formulate these issues into a set of strategic objectives to drive organisational actions. This is the starting point for a coordinated sustainability response.