Checking out some of the bands that influenced your favorite artists is also a good way to get an idea of where they're coming from. It'll also give you an idea of the typical lyrical content and chord progressions.
Saying that, I don't think punk is really something that gets taught or necessarily has a right or wrong way of going about it - it just sort of happens...it's not meant to be slick, it's a reaction to something - in THIS posters opinion (how's that for covering your back? :p).
Don't worry too much about me, ignore me long enough and I'll go away.