Here's a video that might help. It's not great but it's a good primer for beginners.
There are a few things he does wrong, which I feel obligated to point out. First off, his weight transfer is poor, especially in motion. When skating, it's critical to get all your weight to your inside leg just before you release. That's the left leg is you're a LH shooter. It's actually a multi-step process that few non-advanced players understand. He also doesn't follow through strong at all (symptom of a poor weight transfer?).
Step 1) Start with the puck out away from your body and keep your weight on your outside leg, for me, LH, this is my right leg as the puck is out to the left of me. You should feel it in the front side of your outside leg because you're heavily relying on hip rotation to generate the transfer toward your inside leg. 2)Then as I pull the puck in closer to my body, I shift the weight to my left leg, the inside leg. I don't just lift my outside leg up though. I take a stride off it first. 3)Then as you're transferring the weight to your inside leg, let the puck get a little ahead of your blade and snap it off. Remember to let it roll down the blade a bit, similar to the wrister and get anywhere from 1 to 3 inches ahead of your blade. Snap your wrists to finish. A great trick for deception is to do it without ever looking down at the puck. Use the feel of you blade instead of looking down at the puck. This DESTROYS goalies. If you do all this successfully and relatively quickly with some accuracy, it's almost unstoppable at any level, up to professional. You can practice this off ice, with just a stick, no puck necessary. Muscle memory is extremely important because it is far more complex than a wrist or slap shot. Keep in mind that if you're really flying at a high speed, this requires you to slow down a little, just enough to coast onto your outside leg.
I also have to pick a bone with Jeremy's video. Weight transfer is the whole trick in the snap shot, it's just that most people don't know how to do it right because it's very tricky. Don't focus on flexing the stick, just try for a deceptive, abrupt release and do the weight transfer properly, the stick will load itself and your shot will be a bullet, I guarantee that.
I actually paid a private coach, guy had an INSANE snapper 160 lbs but he's broken goalies fingers and hands off snappers many times. He played in the Q and ECHL but he got a couple bad concussions, anyway, a while back just to let me watch him and skate next to him as he shot. I was actually taking mental notes the whole time, it worked.
