1. Be sure 1/2 inch of your shirt cuff is visible when wearing a suit and your arms are hanging freely at your sides.
2. All your suits should have double vents (2 side vents) or a single vent in the middle. Reserve no-vent suits for waiters, weddings, and Miami Vice reunions.
3. Remember this: pant pleats are dead. All your pants should be flat front. If you must have a pleat, consider having inward-facing pleats. They tend to balloon less.
4. Try wearing brown shoes with grey suits. The darker the suit, the lighter the shade of brown. This rule applies to navy suits as well. In general, wear black shoes only with black suits.
5. Never button the bottom button on your single-breasted suits. Ever. By now you should only have 2-button or 3-button suits in your closet. Leave the bottom unbuttoned. If you are wearing a double-breasted suit, button all functioning buttons. For all suits - if you are standing, the suit should be buttoned. If sitting, unbuttoned. No exceptions.
6. The width of your jacket lapel should be similar to the width of your necktie. Remember, moderate to narrow ties are the current fashion.
7. Your pants should only have a single break at the shoe. No folds upon folds. The leaner the trouser cut, the less break you should have. But never more than a single break. Cuff or no-cuff? Either is acceptable.
8. Try a vest. They are versatile and hip. They add several new options to your wardrobe. And they are currently fashionable, even with jeans. Tip: always leave the bottom button of your vest undone.
9. Get a fitted dress shirt. Trust me - It's flattering. You'll know why men love them as soon as you get your own.
10. Buy a new suit this year. Expand your suit collection and push your personal style a little.