Something for scribes/illuminatiors: a travel watercolor palette from an Altoid tin & gum packaging. Could be done with pressed metal or carved wood inserts and gouache instead. A second tin for tools would allow more paint.
Make a wipe-off weekly menu board in your room with a picture frame and your favorite scrapbook paper. To change the look for the season or to match your new room decor, simply just change the scrapbook paper.