I love my sketchbook.

However, it has taken shape to look like something natalie dee would create (see also: I'm not sure if this is a good or a bad thing. Of course, I think I am funny, but I think a good majority of my humor is lost on others. I would love to collage, but the problem with collaging is actually finding things to put together. I have these ideas of things I would like to see together, but of course, that is not the point of collaging.

How do I better my sketchbook and show concept development while still showing variety? What are your suggestions?