http://www.humanreligions.info/tags/superstition.html
Human Truth Foundation pages (11):
The Mystical Number 7, in the following sections:
Reincarnation
Science is Shrinking the Supernatural World
Criticism of the New Age: Ridiculous Practices, Daft Beliefs and Pseudoscience
Miracles - The Proof That Every Religion is the True Faith!
Taoism / Daoism: 4. Cultural, Magical and Folk Trappings
Why Question Beliefs? Dangers of Placing Ideas Beyond Doubt, and Advantages of Freethought
The Divine Number 12: 12 Gods, 12 Disciples, 12 Tribes and the Zodiac
Nightmares and Night Terrors: 2.2. Religion and Superstition
Not from the Human Truth Foundation, but still relevant (1):