There are lots of ego filters blocking most messages coming through so the moment you think:

"I am lucid dreaming tonight!"

There might be some belief and filters of your ego thinking "You know that is not true. That is the most stupid thing I have ever heard. It's nice you are trying..."

Well it might not be that harsh, but you get my point - Your belief and fear can block the mantra.

I think I wrote a thread about this a year ago, yupp here it is. It is a summary of Skip Atwater seminar (Director at the Monroe Institute):

http://www.dreamviews.com/attaining-...firmation.html

It's just a theory, but if you think it is too advanced, the simple version of is the way I do it every night.

Just clear your mind from through and worries and meditate before going to sleep, and then you fall asleep in a state of tranquility and deep relaxation.

The way you fall asleep alone has a bigger impact on your night than you think.

Good luck and sweet dreams!