Arnon Kraft discusses the importance of the first 90 days for new employees. He outlines a three phase process for the first 90 days: listen and observe in the first 30 days to understand the culture and needs of the team; understand the team and business in the next 30 days; and finally create impact by proposing initiatives in the last 30 days to make the team better. The goal is to build reputation, credibility, respect and trust within the first 90 days.