While I'm right there with the author on gambling, I didn't expect to find myself convicted on the reading of novels. Namely, that reading novels makes it harder to read nonfiction:
Their [novels'] structure is similar to that of dramatic compositions. They exhibit characters to view. They have their heroes and heroines in the same manner. They lay open the checkered incidents in the lives of these. They interweave into their histories the powerful passion of love. By animated language, and descriptions which glow with sympathy, they rouse the sensibility of the reader, and fill his soul with interest in the tale. They fascinate therefore in the same manner as plays. They produce also the same kind of mental stimulus, or the same powerful excitement of the mind. Hence it is that this indisposition is generated. For if other books contain neither characters, nor incidents, nor any of the high seasoning, or gross stimulants, which belong to novels they become insipid.
Thomas Clarkson, "A Portraiture of Quakerism".
I've been noticing recently that my reading has been dominated by science fiction with a "thriller" element, that absorbs me and seems to make my nonfiction reading "duller". Much of the nonfiction I read would already seem dull to most people, so this is serious! Also, it pushes me away from spending that time with my family, a much more serious problem.