Actually, Joel has a lot of great blogs, not just the one on the Joel test. Browse through the titles and read any that seem interesting. He has been writing good material for many years. Of course he is not the only great blogger on the topic of software engineering, so whenever you need to google for info on a topic, click on the More... dropdown and select Blogs to find more great bloggers.

I've read some of Joel's posts in the past and will definitely keep this in mind.