Invest in quality clothing, head to toe. Splurge on a higher-end suit if you’re in a conservative industry that dresses formally. Consider purchasing custom-made items for a one-of-a-kind fit.
Check out pre-season fashion trends online or in store display windows at the mall. Looking at effective clothing styles will help you to recognize them in your own closet and identify gaps before you slip into the "no-style" zone.
If your offices include beanbag chairs and ping-pong tables, aim off-center, but strive for unusual over outlandish. Show imagination, but also be aware of corporate boundaries.