Style is often seen as addition to detail; personalizing your unique look through the way you dress. Look, everyone owns pants and a tee shirt. Everyone goes to work dressed in a shirt and tie. This is nothing new. Having your own style is the ability to take the ordinary and make something exciting.
Accessories work for casual outfits (bracelets, necklaces, rings, etc); they also work for formal and "smart" looks as well. Items to familiarize yourself with when trying to spice up your more formal wear are ties, tie bars, lapel pins and flowers, pocket squares, cuff links, watches, etc.
There's no right or wrong way to choose your pocket square (unless you do this)...okay, so there is a wrong way to do a pocket square. Just make sure you don't match your pocket square to the color of your tie or you'll look like a 16 year old kid on prom night. It should complement the colors but not match.
I'm sure you've seen a few different ways to fold a pocket square. Do NOT do the whole pocket square explosion technique. What ever happened to subtlety? Go with a basic fold, or a layer fold like this.
The texture of your pocket square applies in the same way it would for your tie. Silk, linen, light cotton are all appropriate for summer/spring. While wool, or denser fabrics (I even throw a bandana in there on occasion) work well for fall and winter.
I've spoken about tie bars before; I don't want to repeat myself too much. Follow three rules. One, make sure your tie bar is on the CORRECT spot on your body--at the bottom of your chest. Two, If your tie bar is LONGER than your tie, get a new one. Some guys slant it to try and make it work; only do that if they're the same length, not longer. Three, have fun with it. Try colors or even shapes. I love this moustache tie bar it's f**king SICK. There are some really good ones out there, I recommend the gun or wingtip shoe from Suited Man.
In my mind, they're way underrated. Not enough guys have got them on unless it's Remembrance Day (Veterans Day in the US).
Lapel pins/flowers should be worn similar to a pocket square--you don't want to match, you want to complement...if you don't get it by now I don't know what to tell you. I like to coordinate lapel flowers with the season as well--brighter colors and fabrics for summer and spring, and darker colors and thicker fabrics for winter and fall.
The problem is that not many companies now-a-days sell lapel pins/flowers for the sartorial man. If you're curious, take a peek at the extensive collection here.
Wear It Write.