My main use of Creative Commons licences, up to now, has been with regard to other people's work. For the 2011 round of 23 Things, I made the experiment of stitching a CC BY-NC-SA logo to a piece of artwork I embedded in my blog. I expected then that I would be making more extensive use of such logos on artwork copied in the Haddon Library blog, but in fact I have not yet done anything of the kind.
For Alumni Festival presentations at the Haddon Library, however, I've made a point of seeking images first in the Creative Commons area of Flickr. The reproduction has the CC keyboarded into the credits, even if the logo has been lacking. And when readers have asked for images they can reproduce, Flickr CC is where I refer them.
I'm glad that the posts by other participants in 23 Research Things reflect a similar diffidence -- gladder still that the view is, for so many of them, "CC is great and now I've looked at it properly I'll use it more." That's more or less what I said in 2011, I know, and I haven't used CC all that much more since then. But I'm having to prove myself in a lot of areas at the moment, and greater mastery of CC licensing is clearly one that's worth it.