Forward Slip
You can use forward slip with and without flap to lose excessive altitude or to lose airspeed.
Make sure the nose points downwind side. The airspeed indication for the right slip and left slip is deferent because of the position of the static port. Slip to the left, static port receive dynamic air. It indicates lower than actual. Slip to the right, static port receive negative pressure. It indicates higher than actual. Adjust aileron and rudder pressure to keep extended centerline.
4. Recover at proper altitude.