Overview
Choosing the right CC license for your work can be a deliberative and thoughtful process, but it doesn't have to be. We deliberate more below, but if you want to choose a license in a hurry, Creative Commons has a pretty simple tool for picking a license based on a couple of quick questions about how you'd like people to use your work.
Basically, when you're looking to share your work with others, ask yourself: do I want to allow commercial use of my work or not, and then second, do I want to allow modifications of my work or not? If you're not concerned about commercial use or controlling modifications of your work, then you can use the Attribution (CC BY) license. If you want to allow derivative works, but require that any derivatives also be made open, you can add the Share-Alike condition.
It doesn't hurt to think a bit more deeply about what uses you want to permit and even encourage. Every creator has specific interests and levels of comfort with sharing work, so it's important to take that into account when making a license choice. One person's pro could be another person's con. Creative Commons has been collecting a wide variety of examples of people in music, education, and social justice, all using CC licensing for their work: http://thepowerofopen.org/.
++ "A large part of embracing free culture is accepting the fact that you are forsaking control in exchange for something greater – the empowerment of the creative community." The Al Jazeera Creative Common Repository hosts select broadcast quality footage that Al Jazeera has released under CC Attribution to reach a world-wide audience. http://wiki.creativecommons.org/The_Power_of_Open/Text#Al_Jazeera
Exercise
First, decide what license you think you want to use. Then go to the Creative Commons license chooser and answer the questions. Did the license chooser choose the same license you chose? If they're the same, huzzah! If they're different, what do you think happened that led to the discrepancy? Which license do you prefer? Why?
