Within Subnet we always talk about, reference, and measure ourselves against our core values.  Unlike many organisations I've been a part of, instead of pushing values down from the top we created our values by asking our team who we really are.  Our team came back with the values of Being Valuable, Being Passionate, Being Responsible, and Being Part of the Community which really aligned to Subnet's 'Why' of - To Make a REAL difference, through our experience and our excellence.