Besides your extremely good results you need a vibrant resume with pertinent and evidence based details. Include outstanding achievements in non academic field too. Not too long. Pics/graphics may help. Get a marketing person to vet your application.
Secondly and importantly, you need to rehearse your presentation skills while being a good active listener for the interview. Understand the person interviewing you and where is he/she heading in their question. Please don't answer blindly without knowing his message. Try to impress during the interview but be humble and nice. You may bring some short write ups or pics or elaboration graphic notes on any of your key achievements, if you are asked further. All the best. Dress well and speak intelligently.