I haven't had an LD in over 3 months!

Before the summer time in the last few weeks of school last year, I was really into lucid dreaming. I had around 5 in a 3 week period back then, and 2 in 1 week.

Now... I haven't had one since. I've been keeping a dream journal, I've been doing at least 5 RCs a day...

Before I go to bed I tell myself "I'll have an LD tonight!" and then I go to sleep.

I just don't know! What exactly should I do before I go to bed? What can greatly increase the chances of me LDing?