Martin Bucer, the Reformer of Strasbourg and mentor to John Calvin wrote in 1534 a book 
which was intended to help coordinate and develop a direction for the role and duties of the Minister (and Ruling Elder and Deacon, Bucer was a proto-Presbyterian) now that the Protestant churches had grown enough to need to begin ordering the election and placement of Ministers in these new Protestant congregations. This book was really the first of its kind regarding how the Minister was to behave and what role he would have in the life of the Church. Listed below are what Bucer considered to be the 5 main tasks of the Pastoral Office concerning the true love of souls under their care. To purchase the book (which I highly recommend, especially for young Ministers, those considering Ministry, and probably more importantly for search committees) see this link.
1) Lead to Christ our Lord and into His communion those who are still estranged from Him, whether through carnal excess or false worship.
2) To restore those who had once been brought to Christ and into His church but have been drawn away again through the affairs of the flesh or false doctrine.
3) To assist in the true reformation of those who while remaining in the church of Christ have grievously fallen and sinned.
4) To Re-establish in true Christian strength and health those who, while persevering in the fellowship of Christ and not doing anything particularly or grossly wrong, have become somewhat feeble and sick in the Christian Life.
5) To protect from all offence and falling away and continually encourage in all good things those who stay with the flock and in Christ’s sheep-pen without grievously sinning or becoming weak and sick in their Christian walk
