I've been thinking about how I comment on blogs, about what sort of comments are helpful. I've tried thinking about the comments that I get that are helpful to me. (First, let me say that I have like 100 blogs in my Google Reader. I read all the posts. I click through and comment maybe four to six times a day. That means I don't comment nearly as much as I probably should.)
I'm thinking about this recently because I have been debating about what kinds of comments I should leave on blogs.