Now that I'm getting more and more into the business of finding representation for my book, I've started to follow a couple of blogs by historical fiction authors.
Historical Boys is by author C.W. Gortner. He posts on a variety of subjects, brings in guest authors, and lists some good resources for the aspiring writer.
Another is Readings, Rantings.... (I'm not typing the whole title) by Susan Higginbotham, who specializes in late medieval England and, like any good blogger, doesn't let that specialization limit her posts.