Communication is key in the producer role. Actors and crew alike will be happier if you're communicating with them in a way that is professional and courteous. Almost any time someone comments on my producing it relates to how I communicated and how I was courteous towards what the wants and needs of the team.
People like to be appreciated, basically! The producer is the ideal person to show the entire team that they are valuable to the project. No one should be neglected.