Out of state corporations, secret land trusts and all kinds of other "asset protection" nonsense. 

I feel like everyone else knows the secret and I'm on the outside looking in. 

While we work on our next major addition to the site (top secret, but very cool), we're also redesigning many of the areas of BiggerPockets that have been ignored, design-wise, for some time.We decided to start with the BiggerPockets Blog, as it is one of the busiest areas of the site.

It is no secret that a couple Hedge funds came out and took over at least $100 million in shadow inventory across the IE from Fannie Mae, etc.

There are people out there that will ask you for $125,000 so they can show you the "secret" to investing in self storage.

IMHO, the best book written on real estate cycles is by Phillip Anderson, called "The secret life of real estate and banking".

There's not much they can teach you that people on BP won't tell you for free.Mostly what they teach is the more gimmicky stuff to make it sound like they've got the secret ingredient you can't get anywhere else...I know all that stuff and my current business model doesn't really use any of it unless I stumble into a situation that calls for something creative.I will say that my classes made me realize what's possible.

I also go into the property every 3 months to check the air filter and smoke detectors which doubles as a secret landlord inspection. 

@Pavel Ushakov gave away one of my secrets, I love places that looks like the 1970's with green carpet and pink formica counter tops!

I left the best and juiciest secrets in my  Bible Of SEO World Domination.