There are a lot of wonderful blogs out there, but the ones I read most often and value the most are:
The Legal Marketing Blog – this blog has been around since 2007 and posts many great articles about marketing your law firm online. The author is very knowledgeable in his approach to blogging for lawyers. He’s published a couple of books on legal writing as well.
Legal Marketing Lawyer – another blogger who has been around since 2008, he also offers lots of free materials that you can use in your own marketing strategy or just learn from them! His website includes videos, podcasts and other documents to help educate you on how to start blogging for attorneys.