Coloring a great coloring book is as close to perfect, unfettered "me" time as you can get, but sometimes it is reinvigorating to watch someone else color and see what you can learn. Every artist has a different style, and incorporating a few new ideas into your pages works wonders for recapturing the thrill of creating.
Using paint instead of pencils or crayons can make coloring a totally new experience. In the above photo, watercolor is used to apply a delicate, translucent tone to the coloring book page, giving it a soft effect and a different character than a page colored in with crayon or colored pencil. Watercolor isn't your only option; you could use gouache or acrylic, too (oil paint is not suggested).