This is a very good article, and hits lots of very good points.

However, it seems that there is a little bit of a self-diagnosis problem. For example, if you write "voodo code" (great description), unless there is some one to tell you, how do you know? And if you write voodo code, do you know what idempotent means? There is maybe a bit of the "Blub" effect here.

Perhaps between "Symptoms" and "Remedies" there needs to be "Diagnosis" or some hints at self-evaluation or tools for self-assessment.