Gatton's way is how I do it, and I sucked when I first tried it. So keep doing it. Then keep doing it. You'll become comfortable with it eventually.
Same goes with almost anything to do with guitar. Just do work. There aren't any tricks. Pros are better than you and me because they practice (or have practiced) harder, better, and more often.
I make twang for money. And for free. Usually for free.