Raymond Ward's blog, the (new) legal writer, is billed as "a collection of resources for lawyers and other writers."
And that's exactly what it is--you can always find a useful link.
Ward's latest post, "The Redbook (3d ed.)," concludes this this advice--
[I]f you are serious about being a professional writer (which all lawyers are), then you need the Redbook. The optional part is whether to take a CLE class in how to use it. My opinion: if you are going to use the Redbook, then a little CLE time in how to use it is not a bad investment of time or money.