2 Minutes – That’s about how long you should spend describing who you are and what you do in response to a question such as “tell me about yourself.” 7% words, 38% tone and 55% body language – That’s the formula for success in communicating during job interviews and networking meetings. 75% – Make eye contact with the interviewer around 75% of the time. Be sure you have at least 70% of the qualifications when answering a job ad.