How can I speak with confidence? I don't feel confident when speaking English even though I've been studying it for a while.     -Felipe

I was a military linguist for 4 years, and many of my colleagues, especially Marines, practiced something called body-hardening. It's when you slam your shins, knees, elbows, and other parts of your body together with those of the other person, in order to deaden the nerves to pain, and effectively make your body "harder"

Sorry for the nasty image, but I think you have to become "hard" against the anxiety and embarrassment of making mistakes when speaking a new language, too. And this comes through repeated exposure.