Whats in Your Top Pocket?
There is a pocket by your chest plate for a reason...and its NOT for your ball point pen. Whether you fold, flare or fluff it ; a Pocket Square should be used to add some interest in terms of color and/or pattern.
Now that you know that top pocket can actually facilitate additional style and flare, you should start considering the rest of your outfit and then coordinate your accessories accordingly; try as much as possible to AVOID matching your tie and pocket square...PLEASE WE BEG YOU.
Use the pocket square to compliment your shirt, tie, or suit. If you're new at this, try using solids. Here's a little extra reading that will get you on your way.