Abstract: A detailed description of the organization and operation of pre-order food co-operatives in California is provided for consumer groups. Food buying clubs already exist throughout the state, ranging in size from a few families to large organizations with store fronts, credit unions, and nursery co-ops. After a brief history and description of California co-ops, practical information is given on planning, running, and maintaining a co-op. Tasks for the planning stage include policy formulation, legal formalities, supply research, and marketing. Suggested bookkeeping, ordering, and distribution techniques are covered. The importance of regular communication, sharing the workload, and deciding the ideal size of the co-op are discussed. The appendices list information sources and references for periodicals, other co-ops, and technical assistance, and suggestions for structuring meetings. (cj).