Print pictures on old book pages. Looks amazing. You could use a book that has special meaning with the picture or maybe sheet music. Perhaps you would like your wedding picture placed on your favorite song from your wedding. Would make a great gift too.
Homemade glue : Flour, sugar, water & white vinegar = better cheaper Mod Podge (brand of glue useful for collages and other projects where you want to stick things down or seal a surface). It's too expensive.