Although you may already know that you are not moving, this is for those who do. Just as we grieve (or sometimes celebrate) leaving a church. There will always be some people who will grieve your leaving. Whether or not the church folk grieve your spouse leaving, but that doesn't mean they won't miss you and your family.
So if you are moving, how can you be a blessing for the next parsonage family? One thing you can do is talk about how you feel to a trusted friend. You need a safe place to process your feelings too. The next thing you can do is contact (when appropriate) the next spouse and make arrangements to show the parsonage. One friend I know even planted flowers in the yard especially for the next spouse. Giving the next spouse something special is a wonderful gesture. Of course, the next spouse will have feelings about leaving his/her church behind, so be patient. You can also pray for the next family and ask folks at church to pray for them as well.
I'm sure there are lots of other ways to prepare for the move, but pray to be a blessing and not a curse for the next family.
Are there other ways you've experienced? This is surely one way we can help each other. We are all in this together.