I agree with madMonkey.

The best state of mind for getting a lucid dream is not wanting it hard, but knowing you can have one. While we are practicing, sometimes we try too hard and that can be frustrating with thoughts "why can't I?". But as soon as we stop trying too hard, there is no more pressure, all the training pays off and we often get a lucid dream.

So what worked was all the training and practice you did. If you stop training, you still may get a lucid or two as a residual success, but then you will need to practice and dream journal again. Just remember to have a more relaxed state of mind "I am a lucid dreamer" without trying too hard and getting frustrated.