Huey, learn pressure points and general anatomy. Think of any point on the body that does not have alot of "meat" on it. Hands, elbow joints, collar bones, back of the hands and underside of wrists etc... Also you can use the tip of the koppo to grab an ear and use your thumb to pinch it. The Koppo is held in an "ice pick" grip so you can use a hammer fist to strike pressure points or even large muscles.
A dedicated hard strike using a hammer fist to the outside of the thigh will render that leg pretty much useless. If someone grabs you, take the point and "grind" it into the back of the hand or underside of the wrist, combine that with a strike and grind and the hand is pretty much useless. Another great strike is a "rib rake". Start at an angle under the arm, striking into or below the armpit. Continue driving the point down the rib cage. You can see how that would work.
Everyone knows how elbows, shoulders, hands and knees work. Use the point (either side) of the Koppo to anchor in by hooking or just slamming it into the joint. Then use the opposite hand to move that joint in the opposite direction that it normally goes. You just learned the general idea of a joint lock.
When I was teaching self defense classes to hospital workers I didn't use allot of "defense terms" I explained everything as "Body mechanics". You want to move a torso in a certain direction, the arms, legs and neck are just levers to get you there.
An easy way to find the sensitive points is just take a mini-mag and LIGHTLY tap along your own body. You will know when you get a good spot.