The illustration below began with a lack of ideas. One night last summer, I felt the itch to create something but I couldn't seem to move beyond staring at a blank page. So in a creatively-blocked act of desperation, I hopped on google images and typed in random words; "angry monkey"..."old man"...whatever popped in my head. I collected about 20 different images, threw them into a desktop folder and began creating a collage in photoshop. INSTANT ILLUSTRATION IDEA!
I redrew my collage in sketchbook pro, then into photoshop for coloring and textures. Here's a bit of my process below. I strongly recommend this collage trick if your creative brain juices are ever running dry.