Purpose, vision, mission and values

As a community, we developed our values in a workshop.

A community is a social unit (a group of living things) with a shared socially significant characteristic, such as place, set of norms, culture, religion, values, customs, or identity.
Wikipedia

What is the best way to approach the topics of purpose, vision, mission and values? For us, the answer was quite simple: as a community. So we used our office Monday with the obligatory breakfast as a kick-off for a series of workshops in order to get together to discuss our values. Among other things, we worked with impulse cards to approach our values through associations. What methods are in your toolbox and what do you particularly like to use for successful workshops?