A nice, speedy flyer.
Step 1: Please Pass the Paper!
Get a piece of A4 paper, and fold it lengthwise in half. Unfold. Fold it widthways in half. Unfold. Fold the top to the last fold, making a quarter length fold. Unfold.
Step 2: Follow the Images
Fold the top left corner to the middle fold, through the quarter/lengthwise fold. Then fold back from the centre crease. Fold the top right corner to where the top left corner is now. Fold that back from the centre crease, making a diamond on the nose.
Step 3: Forming the Aerofoil
Fold the corners of the diamond to the tip. Then fold the wing flaps under themselves, as in the pictures.
Step 4: The Nose
Fold the two loose flaps on the nose down, and then crunch them into quadrilateral shapes like in the picture.
Step 5: Wing
Fold the wing to roughly the the same shape as in the images, and tape down all loose flaps. Done! Test fly and trim if needed.