Fold a sheet of paper in half lengthwise and crease it firmly
Open it back up
Fold the top two corners down to the center crease
Fold the new top edges down again to the center crease
Fold the paper in half along the center crease
Fold the wings down on both sides to make a dart shape
Hold the dart by the bottom center
Aim slightly upward
Throw it with a smooth, level motion
Release it cleanly without twisting your wrist too much