I like to enter from a slow knife edge. If I'm banked to the right, using left rudder, I'll wait for the plane to slow down, then use full down elevator and some left aileron to enter the spin. Some planes require more aileron than others, so finding how much your plane needs is important. Once the plane is established in the spin, I'll add some throttle to tighten the spin up. To exit the spin I will either release the controls and fly out of the dive, or give opposite rudder input to turn the KE spin into an inverted flat spin, then fly out of that.