Know Your Body
Unless you're Gisele Bündchen and built like an avatar, not all clothing will feel good on you. While styles and trends are subjective, fits definitely aren't, and it's important to know the cuts, colors, and lengths that make you feel good about yourself — and in turn, you'll look more confident (read: better)!

An easy way to do this is to first write down the most distinguishable parts about your body, whether it's your strong calves, your wide shoulders, your small chest, or your long neck. Then, look for a celebrity that has a similar body type. If they're a regular red-carpet attendee, it's safe to say they've probably got a team of stylists and management looking out for their sartorial choices. Take advantage — just because you don't have grands to drop on a style consultation doesn't mean you can't reap the benefits of people that do.

The most important thing, though, is to experiment and to try everything. Bring double the amount of clothing into a dressing room just to see how it looks on your body. Try out services like Rent the Runway and test drive new trends. Shop with friends and see how the same item looks on both of your bodies. Through some trial and error, you'll start understanding the transformative (both physical and emotional) effect that clothing has on a person.