I have a friend whose husband happens to be a bricklayer. His work is excellent, in as much as my limited knowledge of bricklaying can determine. He sets a rate for his work, regardless of the size of wall he happens to be building. If it's a hot day, he may not work as fast as he'll get tired easily. If it's cold, he goes like the clappers as he wants to get it over with.
Pay The Writer
I found this post buried in my inbox and loved what Katie had to say about the value of books/ebooks. :D