Be absolutely clear for yourself that the role and company youd like to apply for really fits with your skills, career track, professional and personal objectives, beliefs and experiences. Conversely check, if you might match with the culture and needs of the company youd like to join. If theres no perceived fit already in this very first step, do not move on and do not waste your nor anyone elses time by wanting to conduct an interview. Only if you know about, and believe in, and feel about such a fit, you can and you will possess and as such radiate a 100% motivation level towards the new role and the new company. And thats what it takes to succeed. Every good interviewer will realize very quickly how passionate you are about her company and how excited you are about the offered position.