I'm still not convinced.
From Wikipedia:
Wishful thinking is the formation of beliefs and making decisions according to what might be pleasing to imagine instead of by appealing to evidence or rationality.
The Law of Attraction is an idea that is widespread in New Thought philosophy. It posits that a mental disposition will attract equivalent external circumstances and events.
Manifesting is a term often used in New Thought and New Age circles to refer to the belief that one can by force of will, desire, and focused energy, make something come true on the physical level. For example, the Indian guru Sathya Sai Baba is famous for allegedly manifesting objects out of thin air.
I have ordered a copy of The Secret on DVD, hopefully that will help further my understanding.