The posts are numbered stages in one course and each links forward to the next, so this reads as a sequence rather than as a pile of separate articles. That structure alone puts it ahead of most blogs on the subject.
The research post is the most useful stage. Instead of telling you to write good content, it covers where to go and what to look for so a piece actually answers what somebody was searching for, and the method holds whatever your subject happens to be.
He claims he can put a piece on the first page of a search most of the time, and is honest that it is not a paint by numbers procedure and that a certain frame of mind has to arrive first.
Two company reviews sit at the end, one asking whether an established firm can do anything for you and one questioning whether a good philosophy survives a poor follow up.
Eight posts. Start at stage one and go in order.