Paweł Szczęsny, one of those rare eastern European names that actually is more difficult to spell than to pronounce, at Freelancing Science (I do that too, but I call it "working for peanuts") made note of two articles on being a great scientist. Morgan Giddings, Assistant Professor of Microbiology and Immunology and Biomedical Engineering st UNC Chapel Hill, wrote On the Process of Becoming a Great Scientist and Paul Graham wrote The Power of the Marginal. Both excellent pieces.