This page explains the six types of Creative Commons licenses:
You MUST attribute correctly - here is a guide for attributing Creative Commons licensed material.
To learn more about licensing, click the "Share" tab of this guide.
To learn more about Creative Commons Licenses review CC Licenses Explained in Plain English, by Sara F. Hawkins
One of the best guides available for creating your own Open Access materials is Open Access Textbooks. Figuring out how to create and protect your intellectual property is one of the most important things you can do as an academic. This video from Open Access Textbooks explains some of the nuances of this process.
A number of best practices for remixing are available:
BCcampus 6 Steps to Modifying an Open Textbook
Creative Commons Attribution Best Practices
Open Washington Attribution Builder
Modifying an Open Textbook: What You Need to Know, Open Textbook Network
OER Editing and Publishing Tools, University of Illinois
Marking your work with a Creative Commons license
More information about localizing OERs: