Basically, here is what I tell myself when I'm going to write something for an audience:
• Nobody gives a fuck ABOUT ME or how cool or awesome I am.
• People only care about how awesome THEY ARE.
• I am competing for their very short attention-span. Facebook, Netflix, and porn are my competition. This better be pretty compelling if they are not going to immediately hit their back button.
• I either need to address some real PAIN they have, or be pretty amazing at entertaining them. In most cases, addressing a real pain is easier. It's much harder to entertain better than porn, breaking news stories, etc.
• Structure for pain is clear:
1. Identify the pain and show how much it hurts and costs them
2. Show them the solution, and how good it will feel to stop losing and start winning
3. Anticipate and address their concerns. Are they worried about cost? Are they worried about how much work it will require? Are they worried what their boss or customers will think? Etc. Think of the most likely concerns or objections they will have and explain how to resolve them. All or most of their questions should be answered so that there is nothing in the way for the next step...
4. Call them to action to do something. Use your tool. Change a behavior. Etc.
The structure can vary a bit, but this is generally the structure. In a purely technical article, you may have very short sections on the pain, then spend most of the time on the solution. If the purpose is more for sales, then you'll want to have it more balanced and focus a lot on resolving concerns.
The article should be clear enough and structured enough so that every paragraph can have a headline. And a reader should be able to scan the headlines and know very quickly and clearly without having to think "what is this article about?"
If the article feels or looks like work to read, they will give up right away and you've lost them. There has to be something really compelling for them. How will this make them more awesome? They don't give a fuck about anything else.
They are milliseconds away from hitting their back button or searching for "nude guitar solos", so put the effort in to deliver something compelling and valuable. One well-thought-out clear useful article is far greater than a hundred jumble-thought aimless ones.
Edit: formatting