U.S. Department of Energy, Office of Strategic Planning, Budget and Program Evaluation's guide to strategic Planning
Requirements and guidance for U.S. government agencies, but contains lots of resource (how-to) information on strategic planning process and best practice.
Materials related to federal regulation mandating strategic planning within the U.S. Government.
A model designed to simplify strategic planning processes.
Template for the state of Texas. Not so much a "template" but rather a nice set of graphics that depict the overall planning process.
Managing for Results is the strategic planning handbook for Arizona's state agencies. Although this is a state government manual, it has a lot of useful information on the mechanics of the planning process (planning components, SWOT assessments, vision/mission, performance measurement) that is applicable to any planning effort. All documents available in pdf and html formats.
FAQs regarding strategic planning - geared primarily toward non-profit organizations but with enough detail and general information to provide useful information to any strategic planner.