As already mentioned by the guys, I also find wbtb practice to be most conductive for inducing lds and can be used with different induction methods (wild, mild, ssild, mantras, etc.)

Here's a great post by Canis explaining wbtb in more detail and also link to the research by Laberge regarding wbtbs.

http://www.dreamviews.com/intro-clas...ml#post2093395

WBTB Study