UNSCREWING A HEADBOARD....NEED HELP?

I'M MOVING AND NEED TO TAKE OFF THE HEAD AND FOOT BOARD WHICH ARE WOOD. THEY HAVE THESE TYPE OF SCREWS IN THEM ( http://imghost.indiamart.com/data/6/J/MY-955091/wood-screws_10580300_250x250.jpg ) THE ONES ON THE RIGHT...WHAT DO I USE TO TAKE THEM OUT....I'M USING A FLAT HEAD SCREWDRIVER BUT ITS TAKING 4EVER.....ALSO IS THERE MAYBE A POWER TOOL TO TAKE THEM OUT ...THANXX