I love vintage images. They have a certain mood that just can't be reproduced - they remember a whole era, a time when the world had a totally different viewpoint.
I love to gather these interesting images and just throw them in my image bag. (Remember that?)
Used book sales are a great place to pick up old magazines, and old books can be taken apart and the images used.
Tear out any captivating photos, and put them in your bag - next time you are rummaging around, grab what catches your eye, and work that into a collage on your page.
You get some fun results: