Creative Commons provides quick and easy to use licenses for people publishing online.  many mistakenly believe that they're only for items you want to share, but it's really for any type of license.  the thing is that you can use  an online tool to select the license you want, publish your work online with an image or text link to that license, and it says in plain English and in legalese what restrictions your work has.  it's a great way to simplify not only the process of applying a license to your work, but also presenting your restrictions to others in a way that make sense  and covers your butt legally.