Use a single sheet of standard letter or A4 paper
Fold the paper lengthwise in half, then unfold
Fold the top two corners to the center crease
Fold the new top edges to the center crease again
Fold the plane in half along the center crease
Fold each wing down evenly to match both sides
Make the wings straight and symmetrical
Add small upward winglets at the tips if needed
Press all folds firmly and sharply
Keep the nose pointed and the body aligned
Test fly and make small adjustments to the wings
Use smooth, level throwing motion
Throw with moderate force and a slight upward angle