How Do You Do Yogic Breathing?

Here's my headstand.

Really, this is my question. My 2012 New Year’s resolution is to start Yogic breathing. I’ve been doing my Yoga asanas regularly but am not sure if my Ujjayi breathing is done properly. This Yogic breathing exercise is supposed to sound like waves in the ocean. However, I also learned that this “Darth Vader” sound should come from the constricted throat. Then, another method involves engaging in the root chakra during the inhalation. Aren’t these all confusing?

So, mine sounds like I’m half snoring half sobbing.