As people have stated earlier, peacocking is about standing out.. \ if your style is preppy and classy.. why not stand out as the best dressed guy at the party.
Unless you are visiting some really high-end fashion orientated club, it shouldn't be to hard. Very few men actually know very much about style (if you are one of them, go see a stylist

)
Some quick ideas.. depending on the occasion, try switching the polo to a shirt (classier) and make sure it FITS you perfectly. Also make sure colors match (shoes and belt are the same color), socks and pants match (not socks and shoes!). Also make sure the colors you use work together (I think there was a good article about this on kinowear.com ).
These were just a few ideas to get you started, hope you find your style!
