Here's a Blog Post from the Mosaic Moments Page that is filled with fabulous ideas for getting more mileage out of your white grid papers.
And here are a couple of layouts that I have created on white grid paper. The first features my scrapbooking room back in the days when it was clean. LOL.
And the second showcases my niece with her pride and joy, a collection of American Girl Dolls. In order to earn each doll, she had to first read each book of that doll's series of historical fiction books. In some cases that was 6-12 books. So she put a lot of work into earning her prized collection.