If you search Google for tips on writing a legal blog you will undoubtedly find a huge list of articles, blogs, and entire websites devoted to the subject.
But a quick word of warning: identify WHEN the advice was written. The online marketing world has changed significantly over the past few years. Reading about "best practices" from three years ago may not only lead you down a useless path, it could be a harmful one--with Google penalties.
The most obvious pieces of advice that were doled out consistently in the past but are dangerous today relate to search engine optimization. If you read an article three years ago about SEO for lawyers, ignore it. All of it. Sure, some may still be relevant, but a lot of it won't be..and there is too much good, new advice out there to tread on old stuff.
For example, you undoubtedly were told in the past (and may still be told) about the need to use a lot of "long-tail" keyword phrases (i.e. Florida injury attorney") with a link from the post to your website. This is no longer true. It doesn't really work, looks spammy, and is not necessary.
Similarly, there are endless articles out there about the importance of "call to action" paragraphs at the end of blog posts. This is supposed to represent the "big sell" -- turning the reader into a calling potential client.
In some respects, this makes sense. Entire sales books have been written specifically about closing the deal--giving the prospect a concrete task.
But is important not to confuse each individual blog post as a sales call. A post is not (or shouldn't be) just a 500 word version of a sales pitch. Going in with that mentality is the surest way to produce a low-value piece of content.
Instead, view the post as exactly what it should be: a way to provide some information that is interesting or informative, without pretense.
Sure, it may not hurt to have one sentence after the post indicating the firm's location/services. But nothing more is needed. And there really is not a need to incorporate the "call to action" in the post itself.
As always, just remember the basics:
* Write useful content
* Make that content readable and easy to digest
* Write consistently so that readers have a reason to come back