1. Write in proper English.
2. Use a grammer and spell checker.
3. Use small paragraphs (2 to 4 sentences) and white space.
4. Hub size 400 to 1200 words.
5. Include photos when appropriate.
These are the 5 main points. Oh yes, study the Hub writing information that is provided by Hubpages. You can also do a search for Hub writing. Or do some hopping and see which hubs attract you and which do not.