
They are typically misunderstood, impractical, and poorly facilitated. Nobody remembers them except those that have the misfortune of having them mounted on a plaque in their lobby. And frankly, even then they don’t remember it.
So what do we do when someone comes to our firm and says they need a Mission Statement? We sell them a brand promise, brand positioning and brand personality instead.

From the Distility Brand Strategy Model
Use Mission Statements infrequently and use them well for organizations that are so large they need to institutionalize common sense. But for everyone else? For you? Seriously, is it what you really need?