Don't use epoxy! :eek: The resulting 'plug' of glue will actually be harder than the surrounding wood, and when you try to drill a new pilot hole for the screw, the drill will step off to one side. Just stuffing a piece of flat toothpick into the hole will also move the screw to one side a bit.

Follow Dr_simon's advice. Drill out the stripped hole to fit a round toothpick (mid-shaft, not the tapered end). Cut the toothpick ends off, so you have a straight dowel. Apply wood glue to the toothpick and push it into the hole. After the glue has hardened, trim the dowel flush with the surface of the guitar body. Carefully drill a new pilot hole for the screw. The drill size should be very slightly larger than the minor diameter of the screw. The minor diameter is the distance from the bottom of the thread on one side to the bottom of the thread on the other side. A hole of the right size will allow the full depth of the screw threads to cut into the wood. If the hole is too big, not enough of the thread will be in the wood, and it will soon strip again. If the hole is too small, you risk breaking the screw as you drive it in. :eek: