1. Push the coin with the thumb over the tip of the index finger until the coin is being held with the thumb and the back of the index finger (on the nail).
   Replace the thumb with the middle finger. Now the coin is held between the middle finger and the index finger with heads facing the middle finger.
2. Replace the index finger with the thumb.
3. Replace the middle finger with the index finger. You are now back to the starting position but tails are now facing the thumb.
4. Repeat.

This is spinning leftwards (assuming your using the right hand). You can also do the spin to the right, forwards and backwards (rightwards is the hardest for me).

Once you can do this trick smoothly practice it using the middle and ring fingers, and the ring and pinkie fingers. At first this will seem awkward but these variations are essential for some of the other tricks described later.