People have always cooperated by working together in groups to meet shared goals; this has been a collective human activity since the beginning of time.
USDA How to start a Cooperative 
The Decision to Start material for training of co-operative advisers 
Starting a Cooperative Business Plan Template 
New Coop Guide 
Start a co-op UW 
how-to-start-coops-new 
How to start a co-op 
How to Build an Effective Nonprofit Board-The-Complete Guide 
Cooperative Startups & Education 
Co-op Improvement Program