What does it take to make one collage mixed media painting?

Sometimes I have an idea which materializes quickly, sometimes it emerges slowly. Quick means 'a few hours', slow means 'even weeks'. Sometimes I start with the background and I built the story on that basis; sometimes I start with a drawing and develop a collage around it. Another time, I have a quote which I want to use, so I take that as an inspiration for the rest of the painting. In fact, there is no fixed concept – which I like very much! It gives me my freedom to express myself differently every time. The materials vary from old book pages, musical sheets, paper or fabric lace, buttons, stamps, postcards to magazine pages and stencils. The colors are mostly acrylic, although I also use watersoluble ink pencils, and graphite pencils. All my work is made on canvas – some on wood panel.