Being a strong visual learner, I love discovering a children's illustrator who possesses a bright spark of childhood. Sometimes like an writer changes a story's voice, I imagine a picture book recreated in a different style.
Think of Diary of a Wimpy Kid as illustrated by Maurice Sendak.
Or how about: Click Clack Moo, Cows That Type as illustrated by Dr. Seuss?
Just like changing illustrators, when I'm at a creative impasse I imagine what the story would be like told from a different viewpoint. It often gets me moving again. Whatever works!