As an oil painter I have a lot of frames hanging around my art room. Some are very beautiful but empty.
I decided to make an inspiration board to hang in my office with an empty frame, scrap textured wallpaper and cork board (cardboard works as well).
(Sample cards from Brooklyn Tweed, Tanis Fiber Arts and Quince & Co)
And on the other side of my office I do have a frame with an actual oil painting :)