Late post, but you deserve a reply.
I recommend that you make the passion about the practice itself and not the result. Lucid dreaming is like any other practice, it will take time so you might as well have fun during the way and enjoy the journey. There is just too much hype and expectation about different things in life, so the real deal feels dull. For example, chick flicks isn't how love looks like, porn isn't like real sex, and what you read and expect about lucid dreaming isn't going to match your own experience.
The problem with motivation isn't there because you don't achieve your result, it's there because you have too high expectations.
Love the small steps and you can walk the whole stair! If you aim too high and try to get up there in one jump, you will tumble and fall.
So identify your current level and enjoy practicing what already is your strength and overtime you build on that.
When most beginners were upset by not achieving lucid dreams, I was excited because my dream recall was improving.
Now I love to practice and learn about awareness in general, and then lucidity is an afterthought.
Set up your life in a way that makes it about the action torwards success and not about the success in itself, and you got control of your own success rate.
And as always, I'll recommend meditation, because that trains your brain to operate from the prefrontal cortex that governs self-awareness, willpower and well-being. This way motivation (and lucidity) doesn't have to be sparked, it is your state of mind.
Peace!
Bookmarks