If you can’t relax during your interview, then nothing you do to prepare will matter. Being yourself is essential to the selection process, and interviewers will feel it if you’re too nervous. Showing fear or anxiety appears weak compared to a relaxed smile and genuine confidence. Numerous studies show that smiling not only increases your happiness and confidence, but it also puts the people you’re interacting with at ease. This is mostly due to mirror neurons in the brain that naturally mimic other people’s expressions and emotions.