Planning and preparation!. How you plan and prepare for your interview will clearly increase your opportunity for success!
As a recruiter, I have come across many job seekers who are willing to explore the job market but may not have any apparent reasons to leave their current jobs. These group of job seekers are the most likely to drop-out from a hiring process, even at offer stage, because they are more likely to accept a counter offer from their current employer. However, is it a wise decision to accept a counter offer? Will the underlying issues that prompted a person to passively explore job opportunities disappear or improve with the counter offer? Or is it all due to fear of change?