The usage posts are what most people call the grammar posts, even though they're rarely about grammar, per se, or even syntax. I used to do them about once a week or so, but now I do them sporadically because sometimes they're just hard work, sometimes they're frustrating, and sometimes I just don't want to! You can find them in my memories section, or if you access my main LJ page, they're listed in the links box under Usage and Writing Posts.

Basically, they came out of my talking sometimes about my job and from people I'd beta edited, and they wanted to know about some of the things I commented on such as serial commas or why till is totally correct (instead of 'til) and so on. I try to use fannish things as examples for how to do things, and blow up myths about what's correct and not. Fannish stuff seems to help get the points across, I think.