basically, David DeAngelo was his mentor, so a lot of the advice David D gives David M uses in his Internet Dating guide. it's all about the 5C's. David M also gives his template on how to write a good profile, and not to be like eveyrone else on there who says the same **** (like "I'm funny" or "I'm a nice guy"...if you're funny, write a funny profile/comments, don't just say that you are).
when you're emailing women, he says to remain a mystery and not to tell too much about yourself on there, keep it vague and let the details come in when you're talking to them on the phone/in person. he also said to basically make fun of what the other guys email to women and how wussy they sound, like how they like long walks on the beach, cuddling, crying to Meg Ryan flicks, etc. the include a short blurb about yourself and drop your email address at the end so they can email you back (which hasn't happened for me since I've been using this thing).
I think one thing that turns them off is that I came across as being too big of an ******* on my profile (which may or may not be good). I actually had a part that said something to the effect that I don't want you if you're high maintenance, flakey and insecure.
It's a work in progress, I'm constantly tweaking my profile and emaisl to find out the right formula.