Another thing people recommend is consistency, both in timing and content.
Some people take this to the extreme and say you should always post on a particular day of the week (as determined by the metrics) but I just try to avoid leaving too big a gap between articles so space them out if I've got a couple of things to write about.
Also be consistent in what you post, if your blog is about fluffy bunnies then don't be tempted to include an article on wrestling or paintballing. Sometime you can spin the article the right way but often it's better to leave it out.