#6. A tie can make the difference
Technically, a tie is also an accessory, but it deserves a section of its own. If you’re looking to pull off the formal look, you can’t go wrong with a black tie. If it’s informal, any colour can usually fit. However, whatever you do, make sure that you do not detract focus away from the rest of your suit. A tie is an accessory, not the main part of the outfit.