Chuck Wendig is basically like a hairy, foul-mouthed little writer god and you should listen to him. Read his 25 Bad Writer Behaviors post. It's a good post. It's a really, really good post.
Caustic Cover Critic discussed E-Book Cover Design here and here. If you're looking for a cover artist, or doing it yourself, read these posts (and this blog).
Over at Do Some Damage, Scott Parker wrote about knowing if you're a writer. I would argue that if you write and identify yourself in any way by that activity, then you're a writer (even if your work only has an "audience of one"). If you're feeling any of the insecurity or self-doubt that seems to come with writing, that's a good post to let you know you're not alone and there are ways to make it better.
Girl Who Reads discussed negative reviews in her Tips on Thursday post this week. I've said it before and I'll say it again: reviews are for other readers, not for authors, and authors would do well to keep in mind that a negative review isn't a personal attack (except when it is, and then it's not about the review, it's about nastiness and being a jerk), it's an opinion, and everyone is entitled to their opinions.
Rik Davnall's posts likening a story to sex and books to sex toys made me laugh, entertained me, and informed me enough to make me think--which means those posts hit the perfect trifecta of How To Be Successful On The Internet.
Lynn Viehl's Zero Cost Ten is packed with useful, free writing tools. I love it when she makes posts like that!
Every single one of Delilah S. Dawson's posts last week was golden. Every. Single. One. Go read them all.