A good number of resources are available that both describe the problem and prescribe different kinds of corrective solutions (none of them necessarily easy). While there is often material beyond simply mental health, most of resources I have found are described with the subject heading "Clergy - mental health." There are at least 170 different articles that I have found in the ATLA Religion Database. Most of these would be available in electronic full text or in print at the Divinity School Library.
I similar search for books brought up the following:
Rediger, G. Lloyd.
Fit to be a pastor : a call to physical, mental, and spiritual fitness /
Stacks | BV4397.5 .R43 2000
Ministry and community : recognizing, healing, and preventing ministry impairment /:
Stacks | BV4398 .S64 2000
Well-being in ministry ; a guide for pastors, staff members and congregational leaders /
Stacks | BV4398 .W444 1999
Harbaugh, Gary L., 1936-
Caring for the caregiver : growth models for professional leaders and congregations /
Stacks | BV4398 .H37 1992
Oswald, Roy M.
Clergy self-care : finding a balance for effective ministry /
Stacks | BV4397.5 .O54 1991
Gaddy, C. Welton.
A soul under siege : surviving clergy depression /
Stacks | BX6495.G27 A3 1991
Sanford, John A.
Ministry burnout /
Stacks | BV4398 .S26 1982
Beyond these two sources, there are more descriptive articles of issues particular to clergy within the psychological literature as well as more general resources on life-balancing (ie not specific to clergy). Seems like it might be a good idea to browse the books (above) and see if there is one or two that would be helpful. Then, if there are specific issues you want to investigate further, we can do some searching in the journal literature.