Speaking with body language expert Patti Wood, Forbes suggests that before you head into an interview, you physically run through how you'll do it:
Like most job interview tips, this one is about preparation. The goal is to make you confortable from the start so you'll be more confident and less likely to give off negative body language cues. We've talked before about the negative body language cues you want to avoid in a job interview. These include any extreme movements, stillness, and even a good handshake.