Uh, sheer bloody-minded stubborness? In all seriousness, near 4 years of unsuccessful attempts under my belt which have made me uniquely familiar with how I fall asleep. WILD is truly different for each individual. While you may have the fundamentals pointed out to you, you won't have an effective technique until you have learned to navigate your own hypnagogic process (after which technique becomes near irrelevant, ironically).
Having said that, I think that the best way to teach WILD is a mixture of Mzzkc's theory, Sageous' practice, and Gab's technique. The method I settled on was to progressively relax my body while letting my mind wander (the importance of letting your brain fall asleep is overlooked) and then switching to my anchor only when the hypnagogic state has been reached. I think too many newbies start out with the anchor from the beginning of their dive when they are not already far enough along to falling asleep, which leads to dives of an hour or more (although I didn't mention it in my DJ the whole WILD - dive and LD - took less than 45 minutes).
So there's my thoughts on WILD. Maybe if I start having hundreds of WILDs I'll write up "the ultimate anti-technique WILD" guide.