This one (above) is an office doodle, technically. After lunch, I had to be on a conference call, and it was kinda slow going for a bit, so... I got my markers out and started doodling.
Here's a page from my art journal that has mostly collages in it. The color is really washed out here. The green is a gouache, and the images are from magazines and catalogs.
I like this kind of collage. It is so relaxing to cut and paste, and it can be whatever! The image has no planning or preconceived idea guiding the process, it just emerges on it's own. As I cut out colors and pictures, images and shapes that appeal to me they end up together somehow, during the process. I might find connection between some of the images after I've already laid down half the page, and then I'll find something in the scrap pile that seems like it also belongs on the page! How cool is that? !