The number one piece of advice from Samuel, who has successfully secured a graduate job at Gallagher, is to show your enthusiasm and hunger for work. Demonstrate that you are eager to kickstart your career and are ready to take on responsibilities. Additionally, be genuine throughout the application process and during interviews. Show your authentic self, as employers value individuals who are not only skilled and efficient but also accountable and honest in their approach to work. Being genuine and passionate about the opportunity will greatly increase your chances of succeeding in the application process at Gallagher.