Good Governance Guides
Chartered Secretaries New Zealand has prepared a series of Good Governance Guides in the area of corporate governance with the intention being to "provide value to individuals as a starting point or as an information source on governance issues."
While they are designed specifically for companies, there is much that is relevant to charitable trusts and incorporated societies including: sample document retention policy, board agenda and minute taking, and board evaluation.
http://www.csnz.org/Category?Action=View&Category_id=190