Previously, the best advice on how to end an interview was to inquire about the process and next steps. (You can read more on How to close a Job Interview from January.) That advice is still relevant, but this recent article from Brazen Careerist has additional suggestions. To reiterate, however you choose to close the interview should be within your own comfort level and be reflective of how the interview went. You must be able to read the interviewer and determine from their body language, tone and facial expressions the correct next step.
The current job market
Two recent Harvard Business Review posts cited some interesting statistics from the September U.S. Bureau of Labor Statistics data. "As of January 2012, the median time that wage and salary workers in the U.S. had been with their current employers was just 4.6 years," according to the first HBR post by David K. Williams and Mary Michelle Scott. "Other recent data points are equally disturbing: The staffing company Randstad says that 40% of employees are planning to look for a new job within the next six months. Another survey notes that 69% of employees are already at least passively shopping for new job opportunities via social media today."
Follow through
Just as important as showing up to a meeting and remaining present (read: not checking your phone incessantly, having side conversations, etc.) is actually doing what you say you will. Everyone has experiences where the person or people who agreed to complete a specific taks or help with a project, campaign, or committee falls off the face of the earth leaving you hanging. It sucks.