I need to remove a stripped screw

If the head of a screw you are trying to get out is stripped, here are a few ideas:

• Make sure the screwdriver you are using is as nearly new as possible. Look at the tip of it and make sure you can see NO rounding or nitching of any kind. The less it bites, the more of your force is wasted trying to press it into the screwhead in the first place.
• An impact driver takes the force of a hammer and turns it into rotary torque. This is a very useful tool, especially for older vehicles with stubborn fasteners. Can usually be used for screw or nuts/bolts.

• In the absence of an impact driver, smack the butt end of your regular screwdriver with a hammer while turning. Put additional turning force into as you make the hit. DISCLAIMER: This is pretty dangerous, so use great caution about doing it. If done poorly or with too much force, you stand a chance of hurting yourself or punching the screwdriver tip through something, or breaking whatever you're working on.
• Do you have a cordless driver drill? Most of the modern, quality ones have multiple torque settings. Using a good bit, start at the lowest setting and let it ratchet for a second or so. Keep doing this on each successively higher setting. There are purpose made cordless impact guns made by Makita and the like, too.
• Using a Dremel tool or similar cut a slot into the head and use a flat blade driver. Sometimes the additional torue at the very edge of the screw makes all the difference in the world.
• With a *sharp* center punch knock a divot as close to the edge of the screw head as you can. Then lean the centerpunch all the way over and try to tap the screw out.
• Drill the head off the screw. Using a small pair of vise grips (needle-nose if you have them), grab the protruding nub of the screw (if there is one), turn it out and replace screw. Replace with an Allen screw if you can find one.
• Purchase a set of drill bits made for screw extraction. The kind that work with a T-handle are better, because you can remove it by hand, and have better control over the torque.
• Take a properly fitting screwdriver, then attach a set of vice grips (very tightly) to the shank just in front of the handle, to form a "T" (the screwdriver would be the top). Use all of your weight to push straight in on the screwdriver towards the screw, then use whatever remaining strength you have to twist it using the leverage of the vice grip.