Actually changing the speed of the wheels at all will cause the little traction you have to be used up it's best to accelerate and brake as little as possible during a slide

When you start to slide it's best to let off the throttle gently turn the wheel in the direction you want to be going until your car is facing generally in a safe direction then straighten the wheel and gently press the brakes until you feel the traction giving out when you feel that slightly release the brakes to regain traction then press brakes again continue pulsing brakes like this until slowed