First and foremost: pick the topic you wish to discuss and then plan it out: What would you like to discuss in your topic? What traits in your topic do you think will be relevant (and possibly could be used as staple knowledge to your audience)? Once you have that all settled, start with an interesting introduction as your hook. Try and capture the audience's attention with a good strong introduction for them to be interested in reading your hub (make sure you don't go over extensive [like this comment]). After the introduction, start including text in different text boxes. Make sure you also include a variety of pictures (I normally choose 3-5). Make sure you give clear, concise, detailed, and easy-to-understand paragraphs in your text boxes (and make sure you don't under-say or over-say anything). Once that is all said and done, include tags. You can easily find tags if you use wordle.net. With wordle, just copy and paste the text into the box and then it will generate the most common words you have used. Use a good amount of tags, then add a summary. After all that, proofread and then post!