You should definitely follow Digital Humanities Now.
One way to find other blogs is just to do some searches for your field—“Russian History Blog,” for instance, will take you straight to this good group blog. Try to find blogs written by academics so you can see how professional historians write. If you can’t tell who the author is from the blog, that’s usually a bad sign nowadays. (Academics blogged anonymously quite frequently in the early 2000s, but now they tend to do it under their own name).
Group blogs are particularly good. Some group blogs with a particular subject area you might interested in are:
The blog of the Society for US Intellectual History.
Blog of the Forum for the History of Science in America.
has a blog: you could follow it, or even better go through some of their posts to see who they’ve been following themselves.