WILD requires you not to move. My technique is like this:

After you wake up in the middle of the night or the early morning, use the bathroom(like WBTB). After you use the bathroom go back to bed and lay down and close your eyes. For WILD you have to remain still as possible but after you lay still and close your eyes, relax for 20 minutes. During those 20 minutes if you feel the need to move your body, move it. But you have to do it with your eyes closed. After those 20 minutes fall asleep naturally while keeping your eyes closed. Everytime I seem to do this, I always end up at the start of my dream.