We drafted a simple step-by-step guide for starting a California nonprofit public benefit corporation exempt under 501(c)(3) for CalNonprofits. An earlier version was made available in Spanish (Como empezar una entidad sin fines de lucro en California) in October 2015.
Here are some other articles you may find helpful:
Starting a Nonprofit: Articles of Incorporation and Specific Purpose Statements
Starting a Nonprofit: 10 Considerations in Electing the Initial Board
Starting a Nonprofit: The Value of Making the 501(h) Lobbying Election
Also check out our YouTube series on starting a nonprofit:
Initial Board of Directors
Purpose Statement
Fundraising Before Exemption
Form 1023
Initial Bylaws
Alternatives to Forming a Nonprofit
Fiscal Sponsorship
Private Foundation or Public Charity