I fill my mouth with smoke, form an ooo with my mouth, then and most important, make my tongue pointy. I then poke the smoke out with my tongue; you don't exhale at all. Yeah, it has to be dead calm, outdoors won't work. You'll know you have hobbit blood when you can blow a big smoke ring, then follow it up by blowing a smaller ring through the bigger one. You can't do it inside either if you're under the A/C vent.