My AD gave me some great advice before the season began "Let them talk and get it off their chest, by then all the steam is let off and talking can begin "
For me I enjoy engaging in conversations with parents and getting their take on the situation. Their input is justified as they are shareholders.
The usual issues are playing time and postitions. Those two are determined by the standards and practices the coach demands of his team.
I let the parents know in a meeting about a week into the season all my expectations and clearly how I plan on getting there.