I'm curious as to how most of you draw from a concealed holster, and wanted to share my methods.
I use two different techniques, depending on clothing. Heavy clothing, like a leather vest or heavy jacket, I just sweep back with my gun hand and then draw. The material will fling back far enough to not get tangled up. When wearing an open shirt over the holster, this doesn't always work though, because its too light to go back very far. A few months back I read about a technique called the "Dracula draw." The name comes from the fact it sort of looks like Dracula pulling his cape up to turn into a bat, although not nearly as pronounced.
I'm right handed, so I'll use "left" and "right" instead of "weak" and "strong" but you get the idea.
With my left hand I grab my shirt on the left side. Just as a natural movement I grab it just below belly button hieght. Then jerk the shirt left while going for the gun with the right hand. As soon as your right hand closes on the grip, let go of the shirt with the left hand and start bringing it up to meet the gun for a two handed grip.
The benefit is is always gets the shirt out of the way and their is no danger of it falling back in the way before you clear the holster. A second benefit is that the movement to your left draws an assailants attention to that direction briefly, making the appearance of a gun a bit more surprising and moving your apparent (intuitive) center of mass a bit left as well. Moving right while drawing will help get you out of the line of threat.
This sounds more complex than it is. I've got it into "muscle memory" now, and I started with the simplest part and then added to it until I had it all down. The hardest part was remembering to let go of the shirt to go to the two handed grip, so I ended up walking sideways with a one handed grip and my shirt still held out to the side. Yes, I looked like a dork.

So, I practiced just the grab and clear, then added the draw and grip, then added the movement. Now its second nature.
It works fine with the vest or jacket as well, so if I get confused and use this, it will work unless I'm in a sweatshirt.

I've found that to be the slowest, though, with the left hand jerking up the sweatshirt on the right side while pulling the gun.