Please lead your church to enter into a mental/emotional health agreement with your ministerial staff.
Require ministerial staff to take no fewer than two (2) prayer retreats each year. I can suggest a format if you wish.
Require ministerial staff to visit with a mental health professional (LPC, psychologist, et al) of their choosing at least once every two years. You pay for it.
Require the ministerial staff directly involved to take additional time off from other work for every funeral or wedding they have to solemnize. You go to one funeral, spend an hour, cry, and go back to work. He gets to do it three to five times a month.
Make certain his/her salary package is keeping up. Usually, a minister agrees to a certain package when coming to a church. He/she may get a small cost of living increase in a good year and nothing in a year considered "not so good." When he/she leaves, the church is often amazed to find out how "out of the market" they are before they can get new staff of a similar nature. What does this say?
Leave his/her family alone. They are not on staff. They don't need the "Three Billy Goat's Gruff" Treatment. Really.
Don't take him to lunch to tell him who is angry this month. He probably knows. Instead, put two new tires on the front of his car, pay his cell bill or do something else that says, "I care and I want to take off some of the strain."
Don't invite him/her to "unburden to you." He/she may do so but do not bid him unload.
Yes, tell him/her when he/she is wrong. Just don't tell the whole world about him behind his/her back. The former is courageous, while the latter is just gossip.
Churches of all types are running out of ministers. In particular, mainstream churches are running out of experienced, educated, long-term, called pastors and staff. Maybe we don't need them. However, if you are going to keep trying to have a pastor/staff, you have a Christian obligation to nurture them.
Admit you do not know what a pastor does. Oh, really? What is his schedule? When does he pray? What is he reading? Does your church expect him to be more chaplain than evangelist? He has the same 24 hours in a day you use. He is a generalist in an age of specialization. What do you know about what he does?