Stephen Covey is not a pagan. He is (or was) a Mormon. Paganism is a fairly defined system/family of belief.
That said, yes, I found his original book, The 7 Habits..., quite helpful. I can't promise it will actually make you highly successful, but it may let you know if you're thinking and acting in unproductive or inefficient ways. If you actually followed all the advice in the book, you probably would be very successful at something, but I have found execution more difficult than cognition.