I'd like to say its difficult and all mysterious but its really not. 1 book was all I needed and I seem to naturally have most of the traits needed (I'm VERY confident).
Yesterday I was at my parents house with my wife, kids and some more of my family. The topic came up and they asked to see what I could do. Next thing you know my sister is under and she cant move her hand off her leg - the more she tries the harder she laughs! Then she goes under again and this time she cant remember her fiances name (he's watching the whole thing) - again the harder she tries the more she laughs (we have tears of laughter by this stage). I bring it to an end and leave her feeling happy, relaxed and full of energy.
I'm gonna practice a lot more and can see this skill helping me with so many of my projects.
Its a great book that I learnt this all from and I'll share it with you soon.