In my case, I was having around 1 lucid dream a year until upon reading about it here and reading about it on the web, I "decided" (or intended) to have more. Basically it just worked - I've had about 10 in 5 months.
I feel it's very much a confidence thing though and suspect though I might be wrong that many techniques are simply placebo. I had a spurt of 4 in one month then just one a month except in september - where for some reason I had anticipated I'd have a lot because I'd be on vacation and my sleep patterns would be changed - and indeed I had 3.
My last dry spell was broken just this night. It may have had to do to the fact that I picked up the PhotoReading course. I somehow felt that in having to tap into the non-conscious mind for the course, I'd develop useful skills for lucid dreaming too.
So basically my recipe would be to think about it and be confident. Good luck!