Talk explicitly about what you want. Tell your team the values and motives that guide your decisions. Don't assume people will see them. Say them outright and invite discussion.
Walk the talk. Maintain integrity between what you say and what you do. This will prove your authenticity.
Be consistent.. What you practice should be the same from day to day, from person to person, from situation to situation. If it's not, people will doubt you. When there are discrepancies, explain them.