Don't reinvent the wheel.
Look here first for best practices related to sustainability. We use the power of our members to seek out and evaluate the best examples of policies, tools, practices, etc. Use the SEARCH (upper right corner) to find book reviews, sample job descriptions, case examples, training, etc.
Contribute to the field as well! If you know of resources that should be included, send an email to firstname.lastname@example.org with the Subject: Resource Suggestion for ISSP Website. Please review our member guidelines before posting. Note that, due to a heavy volume of emails, we are not able to reply to all suggestions.
Better yet, volunteer for the ISSP Resources Committee. ISSP is a member-driven organization and it is through the help of our members that we are able to continuously improve the resources we make available to all sustainability professionals.