After cooling under cold water and letting set a bit, roll the egg around so the shell cracks all over. Generally at the bigger end of the egg you'll get an air bubble. The key is to start there, making sure to get the skein of the egg lifting the shell part. Once you have that moving, it should all come off easily, in one or two big parts. If you start peeling without lifting the skein, that's when you get the egg white coming with the shell.