Do you serve in a ministry? When was the last time you were thanked? Do you lead a ministry? When was the last time one of the church leadership thanked you for your volunteer service?
Have you ever been asked to do something, with the assumption that you would because you're a "brother in Christ?" Did you do it, only to feel unappreciated because the other person didn't express their gratitude?
Pastors and leaders need to remind themselves, and their congregations, that even though it it's God's desire for us to serve one another, everyone needs to be grateful for that service.
Don't take your congregation's service for granted, and don't dare to use guilt or misplaced exhortations to motivate them. Lead by example. If your words affirm your actions, then we'll consider following your lead.