If you check the "Tutorials" section of the forum, there's lots of info there on WILD and MILD. But, the guts of it is:

MILD is inducing a dream mneumonically, basically like repeating to yourself "I will see a dreamsign and realise i'm dreaming" and other techniques. WILD is a wholly different beast. Basically, WILD is falling asleep while retaining consciousness, basically falling asleep and going into a dream while being fully conscious and aware. It sounds kinda weird, I know, but, it's a one-of-a-kind experience, and totally worth the effort.