I'm on a bit of a dryspell now, but I think I've figured out how to sort of train your DEILDing ability (after you've learned to wake up conciously and stay still ofcourse). If you fall back asleep non-lucid, be more actively aware while visualizing. If you can't get back to sleep and stay awake, be less actively aware. I think it's all about that balance. Perhaps I'm kind of stating the obvious, but I only just really thought about that, and perhaps this helps others as well