I have no clue. So, let's find out. This is a question that a lot of us want to know the answer too. Many of us have some understanding on this topic based on videos, blog posts, books, friends etc. I have my half-baked ideas too, but I don't feel like I have a solution that works. Lets pool all our knowledge to figure this out. But this is not a same-old same-old thread that hashes out what you can get by googling something and reading the first few articles. Let's go into science, history and real-world experiences that sustained. This is a different type of thread in another way too. I am going to just ask questions. I am hoping that asking the right question is half the answer. Please humor me with answers based on what you know. This is an experiment. Let's see if something good comes out of it.