One sound that every do-it-yourselfer hates to hear is a screwdriver bit slipping in the head of a screw. But Ron offers a couple of ways that you might be able to get those screws out, and it's easier than you might think.
The first thing you can try is a product called Screw Grab. This is a gritty material that is suspended in a gel. Just one drop on a damaged screw head can increase a screwdriver's gripping power by up to 400 percent.
If this doesn't work, you might try a screw extractor. First, drill a small hole in the head of the screw, insert the extractor and then turn it counter clockwise. The more you turn it, the deeper the extractor bites into the screw. So if you've got a stripped out screw head, now you've got at least a couple of ways to get those troublesome screws out.