When I'm itching to make collages but don't have any ideas for a big project, I make bookmarks to send along with orders from my Etsy shop. Here's the latest set of 10 (front and back), made with ephemera within arms' reach of me and my scissors (I've started thinking of myself as a "lazy" artist).
I made the backgrounds by tearing thin strips from magazine pages and combining contrasting colors and patterns.
For the second set of bookmarks, I used handmade paper left over from another project.
I sometimes experiment with new techniques on these small, skinny canvases. Below, I play with text snippets I transferred from book pages using Scotch tape. I've started a new project using this technique.
If you look closely at the bookmark with the large fish, you may see a clue about where I got the cardboard for the substrate. (Hint: it's a box of my favorite salty crunchy treat.)