To get a stripped screw out, there are several effective methods:

1. Use a different screwdriver tip or size that fits better and can grip the screw head more securely.
2. Place a wide rubber band flat over the screw head and then press the screwdriver into the rubber band to add friction and grip.
3. Use locking pliers (vice grips) to clamp tightly around the screw head and turn it counterclockwise to loosen it.
4. Cut a new slot into the screw head with a rotary tool (like a Dremel), then use a flathead screwdriver to turn it out.
5. Use a screw extractor tool designed specifically for removing stripped screws by drilling a small hole in the screw head, inserting the extractor, and turning it counterclockwise.
6. Apply penetrating oil (e.g., WD-40) to loosen screws stuck due to rust or corrosion before trying to remove them.
7. Tap the screw lightly with a hammer while turning the screwdriver to help break it free.
8. As a last resort, drill out the screw by drilling into the center until the head comes off, then remove the shaft with pliers.
9. Use an impact driver that applies high torque in short bursts to loosen stubborn screws.

Start with the least damaging methods and proceed to more aggressive ones if needed. Different screw and material types may require different approaches, such as gentler methods for plastic or penetrating oil for rusted metal screws.

These methods collectively provide a comprehensive approach to effectively remove stripped screws without causing unnecessary damage.