Good Day Flounderingsahm
Personally, I just "wing it." I find that whatever I write relatively quickly is almost invariably best, certainly better than pieces that I spend too much time slavering over, constantly revising and so forth. Somehow I have come to believe that if I struggle to write it, the reader will struggle to read it.
The more of an ordeal I make it for myself, the more of an ordeal it will be for you, the reader. This is what I believe, rightly or wrongly. Therefore I don't use outlines, index cards or anything like that. I let it flow.
However, there is one formal methodological procedure that I follow. I keep notebooks full of quotes and interesting facts from various books and periodicals that I read. When I write hub articles and use information that I don't think if common knowledge, I cite it with endnotes (and provide links, of course) - just as we were taught to do in highschool.