I start by knowing something about the subject before I write. For instance my hobby is photography and when I research a topic in that area I know right away if the solution to a problem is a hack or something eloquent. I know what information is credible and which information may be suspect. I often look at magazines I subscribe to, you tube videos where a subject is demonstrated, Wikipedia and other websites that I know to be credible.
I then brainstorm all the possible angles that my hub could take and once I am settled on a direct idea for a hub I "wire frame" the article. The wire frame is really an outline in point form and then It is easier to make sense and sentences for my topic. I decide if I can write the article all in one hub or if I need to extend it. Writing an article that is too long will result in people surfing away unless they have a lot of time. Writing an article less than 400 words will not get you indexed on Google. My experiences so far tell me 600-1200 words are ideal and to have lots of breaks with sub titles, so in your research you must think about how the subject is broken up into natural elements.
It is a big mistake to write about something you have no clue about without researching it in depth. You could use wrong terminology and get techniques wrong. This will eventually drive people away from your hubs and your potential for revenue will decrease.
I hope this helps you and feel free to chat with me on my mail as well