Before deciding which license you want to use for your work, there are a few important things to know:
The best way to decide which license to use is to think about why you want to share a work and how you hope others will use it. Utilize the Choose a License tool to help you decide.
Some things to consider:
Other considerations can be found at the Creative Commons Wiki.
You have selected the license you want to use for your work. Now how do you apply it?
Technically, all you have to do it indicate which CC license you are applying to your work but it is highly recommended that you include a link to the relevant license deed. When you use the Choose a License tool, you can fill in proper attribution information then copy the license image, attribution text, and machine readable code for your work. Add the license deed to help those who view and reuse your work.
For links to the license deeds, see below:
Marking Your Own Work
When marking your own work with a CC license, the best practice is to follow the TASL approach:
If you do not have all of the TASL information, do the best you can and include as much information as possible.
When Indicating the Work is Based on Someone Else's Work
If your work is a modification or adaptation, note that and provide attribution to the original work's creator. A good option is"
"This work, "[title]," is a derivative of "[title]" by "[creator]," used under CC [license]. "[title]" is licensed under CC [license] by [name]."
Bottom Line: In any case, the point is to make it easy for people to know who created what parts of the work and how each part can be used.