Leo Babauta is the master behind Zen Habits, a movement (blog, books, and more) towards becoming a more productive person. He offers great advice. I recently read a very good book from him, The Power of Less, and have been a subscriber of his blog. Today, he has a blog entry that has links to 20 Classic Zen Habits Posts. Some very good articles.
ReferenceThe Power of Less, my recommended book20 Classic Zen Habits Posts – blog posts at Zen Habits