Audience first
We design for a named person, not for a committee.
Where the budget allows it, we build avatars before we build anything: who these people are, how they spend a week, what they are afraid of, what season of life they are in. For a church that means the people in that district rather than churchgoers in general. For something global it means which countries, which ages, which pains.
Then we keep asking one question for the rest of the project. John is our user: what does he do when he meets this screen, this feature, this button? It is a sobering question, and it is the only thing we know of that reliably stops a team from building what it personally finds interesting.