Before you consider using volunteers in your organisations activities, it's important (and extremely useful) to have some guiding principles and standards that outline how your organisation will involve and support its volunteers.
These high-level documents provide a foundation for the development of all your volunteer-involving programs and activities. They will also be the basis of your volunteer-related policies and procedures.
Developing these documents doesn't have to be a difficult or time consuming task. The idea is to have some clear and simple statements that provide a framework for more detailed planning activities.