Okay I know how powerfull Placebo can work.
Therefor I'm going to try a Placebo on a friend of mine who is into Lucid Dreaming lately.
I think I will give him a Capsule with something like Ginkgo Biloba or another herb with no significant effects and I'll tell him it is a mixture of compressed dream herbs that I made and that I've tried it with great success every 4 times I've tried it. Since I cannot fool myself this way, obviously, but I CAN fool him with this completely he is the perfect test subject to find out how powerfull Placebo can work. Another factore might be how Suggestable people are; how open they are to your suggestions. This would work best on the most gullable people.
Any one of you interrested in fooling friends for the sake of Lucid Science? :P Let me know.