If you struggle with writing books and other products, check out two books Tim Ferris recommended in an interview he had with Dean Jackson and Joe Polish from ILoveMarketing.com.
A book on writing that is easy to read.
Bird By Bird
Bird by Bird: Some Instructions on Writing and Life
Discusses the emotional challenges of writing. Shows how to break down writing into smaller chunks to reduce overwhelm. Ferris says this book prevented many nervous breakdowns among his writer friends.