Sell the new practice or process to the team; don’t just dictate policy. Don’t just preach it; demonstrate it. People respond to a working example more often than to a lecture, no matter how good the concept. Make it easy for your team to change. Give them extra time to come up to speed on the new practice. Get them books or training if they need it. And choose the right time to introduce the new practice or process. Show your team how these practices benefit them personally.
I always had more respect for the lead-by-example type of person.