Rainman&Cammy, you guy's are both right about it being what's on your mind. This is why my main method, is to try and keep my mind aware
of the fact, that I could be dreaming at any moment.

I try to hold that in my mind from the moment I wake up, to
the time I go to sleep. And constantly watch for anything abnormal.

I have used this method to become Lucid pretty much at will.

But it is good to do reality check's as well. there has been many time's
when I was on the verg of becoming Lucid, and decided that it
was not a dream. If I would have done a simple reality check,
I would have been Lucid.

I am currently doing more reality check's, the combination of method's
should have powerful result's.