Yes. Write a bajillion words, and you'll become a good writer. Though, you already seem pretty good.
Congratulations. Impressive rate of posting so far. And a very good looking blog. I've got to buckle down and do this myself some day.
Today I'm launching a new blog: http://www.trajectoryofeverything.com
Subjects are mainly rationality and tech. Feedback of any sort is welcomed. Some of the posts relate to ideas that I've considered for LW but felt unworthy. I've been lurking in the LW/OB community since inception and one big goal for the blog is to get myself writing. Hopefully I'll work up to LW level at some point.