It's easy to get hung up on the physical benefits of exercise -- which don't get us wrong, are far-reaching. But there's also a psychological benefit to breaking a sweat. One study found that working out frequently can reduce stress and give your confidence a healthy boost.

Need a lift? Reach for your headphones. Research indicates that listening to pump-up music before an important meeting or big event can give you an extra dose of empowerment.

Those perfume bottles don't just look great on your vanity -- they may contain an instant confidence boost. One study found that 90 percent of women who wear a fragrance feel more confident, which, has the added benefit of making them appear more attractive to others. In short: If you smell great, you feel great.

Your mom was right all those years: Good posture is important. In fact, research from Ohio State University indicates that the simple act of sitting up straight may encourage confidence in your thoughts and abilities. Plus, other studies have found that there's a connection between good posture and productivity levels.