Collage is my favorite form of meditation. To slip into that slower state of mind is so relaxing. It lets my mind really think on the big stuff without visits from the usual tag-a-longs. All the other noise fades away.
I have several collage journals in different sizes to fit the situation. Most right now are altered books.
The best right now is this size mini glue book. I am working in it almost everyday. It is a doable size even on a busy day. And when else do you need some meditative time more.