Post Frequency or Post Quality
I don’t worry that much about post frequency. I prefer to concentrate on quality, and only get two or three posts up a month. In an ideal world I would like get one medium length post (around 500 words) up per week. Any more than that I think would hurt the quality of my writing. My philosophy is, if people enjoy your blog they will come back regardless of your posting schedule, although some kind of consistency is much less confusing for them.

