I'm assuming you've done some research on the company. Understanding the product/service is always a good step in the right direction. Try and interact with employees before the interview. Ask questions related to the company and if they have any recommendations on how to impress HR. Recommending products/services you think might align well with the companies vision can also show your eagerness to contribute towards the companies success. These are just some of the tips I've used in my interviews. Hopefully they can help you land the job. Goodluck.