The part of Step Twelve where it talks about 'practising these principles in all our affairs' is very simple. It means I conduct my affairs, but that, in conducting them, my chief activity is practising these principles.
The worldly purposes of my job, for instance, are no longer my purposes.
My purpose, in my job, is to practise these principles.
How do you do that?
Take three principles contained in or derivable from the programme (ask God for these), and practise them.
The three I was given today are:
Submission
Quietude
Industry
So that's what I'm practising.