This is why I am not a fan of "How to" advice. Because as you say, each one is unique and has his or her own means that they can find out. Of course, there are some general practises which help, like training one's breath. But when we simply follow somebody's instruction and make its success dependent on the teacher's certificate or popularity or what not, than we direct our power not internally but externally and give it away.
It is all about the experience of progress through self-experimenting.

If not, we might do something that is not in truly alignment with our Soul,and thus take decisions which create obstacles instead because these practises didn't originate from within.

At least this has been my experience, take it for what you will :)