Well, I attempted my first WBTB last night, and I found that counting your breaths to 10, then restarting is not only relaxing, but can help to keep your mind awake as you enter SP. I entered, and had a short, but successful lucid dream. The great thing about this is your mind is kept awake, but you can still let your mind sort of wander. Just be prepared to take control when you start to enter the dream.