I'd second what the other poster said - your best bet are recommendations of blogs you like already.

Looking at my RSS feed, I'd also endorse Andrew Gelman's blog (applied stats), A Collection of Unmitigated Pedantry (history), and Applied Divinity Studies (rationalism à la ACX).

look at the blogrolls. they all link to each other. that's hwo to find related blogs. (or as Terrance Tao would probably call, a complete graph)