I do think routines or patterns will appear in one's memory/mindset where things worked successfully on girls before, i.e. you'll realise the subtleties that you if you act in a certain way (confident and not cowering away) girls are more receptive. These will generally probably be more subconscious though.

Every situation is different, and all girls are different. Being flexible with your game and letting things flow I'd say is the biggest strength you could harness. Like Tom says it's all about not thinking, not being aware in that moment. This is 'natural game' in my opinion.