There's no such thing! DB is nothing more than doing what works and stopping doing what doesn't.
Too many people see a technique - LRT is the prime example - and say, "Hey. I'm desparate. If I do this, my H/W will come running back to me!"
I don't remember who posted it, but it has been referred to as "cookie cutter DBing." Despite the fact that there are many similarities in all of our sits, there are always major differences.
We have to tailor our techniques to our own individual sit.
