If you are looking to write SEO articles to please search engine and spread garbage, I would say, please don't write, please spare the internet, do not pollute it. However if you are someone who rely on Internet doing business here are my tips
1. Know your niche: Read a lot. A better reader maketh a better writer. A thing true in a your geography might not be true in other geography. For example if you are in health niche, a home remedy that works in India might not be suitable in Germany. If you gonna write how to home cure common flu, know your audience first. To who you are writing India or Germany. Write an article that may solve your users' problems.
2. Edit Edit Edit: Deletion is the sole of editing, someone has this somewhere. I don't remember source. But I was Editor of Engineering and Sciences for a small publication house. I know how important it is to edit your content. Without editing it will be paradise in disguise.
3. Check Language: If you are not a grammarian, use tools like Grammarly to check language. No matter how perfect you are Grammar check is important to guidance in true directions.
4. Proofread: Do manual check. You cannot rely on any tool fully for checking spellings.
5. Write in points or bullet-ed manner. Lengthy paragraphs are boring. Nobody is going to read you if you are not a Seth Godin. People come on Internet to scan it and find solution and not for sinking behind screens. Bullet style content is much easily readable than lengthy paragraphs. If you are writing a novel that is other side of the story.
6. Is this a guest post? I hope it is if you are reading this article. Give link to website within content in meaning full ways, it could be a word, or phrase that may raise the curiosity of your readers to click on the link and reach to your main website.
7. Do not forget to include Author Bio in the end of the article. Remember, people want to know you.
I understand doing that much seems too big task. But believe me if you will address your audience problems in right ways and care for them 5 SEO articles can create more noise than 100 useless pieces.