I discussed this technique in my Goldendoodle post and here is a bit of video to show it. You simply take a small section of hair from one side and shake, which makes the hair on the other side of the dog fall into place. Comb hair, shake, fall, repeat as needed.
Great on most every coat, but invaluable on drop coats like shihtzus, wheatens, doodles. Fantastic on poms, and other dogs with undercoat. Great on pretty much everything.
Excuse the music in the background. I couldn't figure out how to edit it out.