Get a piece of typing paper and crease it length-wise
Fold one corner to the center crease
Fold the other corner to the center line
Fold in half
Fold one wing down
Fold the other wing down
Fold the wings out, add paper clips to nose (3 small, 2 big)
Bend the back of the wing up a little bit
Throw it gently forward. If it needs adjusting, try another paper clip on the nose, and adjust the amount you bend the back of the wing up.