John Harris, an Account Director that I had the pleasure to work with said to me once "the more I practice, the better I get". 

Once you know how your intuition works then how do you take what already works well for you and continue to refine and improve that capability so over time it works even more reliably and consistently?

Ian Levine, who has been in the music business for years prides himself on having retained his integrity, stuck to mastering his craft, staying with his intuition and what feels right to him regardless of the passing trends and fads in the business. He just keeps on practising and practising and producing better and better recordings.

So how do you fine tune your intuitions? Moshe Feldenkrais found that great musicians and artists and business people were able to make finer and finer sensory distinctions the more that they practised. So, you can simply pick something that you already do well and start to practise on a daily basis. I suggest taking an individual element of your intuition and practising for a month. So, for example if you're already really good at building rapport, practise  asking more open questions for a month and notice what response you get. Then spend the next month matching body posture and notice what response you get, etc. Notice how much fun you have and how much your intuitions develop with practise