Enthusiasm is big. When I write a book, it's a three-year commitment. Toward the end, I'm writing seven days a week, and it's exhausting but thrilling. The only hope is to have some real enthusiasm for the book. ... Above all, you need some strong emotional or personal connection to your material.
Nathaniel PhilbrickSomething like going to get the newspaper can increase your writing efficiency by taking you away from the material. When I'm doing other things, writing stuff will be swirling around in my head, and sometimes I'll see a new way into the material.
Nathaniel Philbrick