Any marketing maven knows there are 4 Ps’ of marketing….product, price, place, and promotion. I’ve even argued that they exist in the virtual world as well.
Dave Armano (VP, Experience Design @ Critical Mass and A-list blogger) laid out the 4 C’s of blogging in one of his latest postings. I have linked to his picture below which shows a very clear graphic representation:

Check out David’s post as it goes into detail about each. Fantastic read. I try to follow everything to a “C”