Many techniques used to create Altered books can be used in visual journals. Jennifer Minnis has published a good altered book tutorial which covers how to get started and briefly introduces a number of techniques used. On the site there are number of other tutorials which cover topics such as paste paper, iris folding and creating waste water paper.
While visiting don’t miss browsing her gallery as it contains sections on sketching, altered books, bookbinding, collage, ATC’s, artist dolls, knitting, quilts, embroidery, and crafts. Jennifer Minnis also keeps a blog.