o Always focus on the title. It should be unique enough to attract readers to read the whole article. And yes, the title should also have relevant keywords.
o Every one has his own style. But your style must be friendly and the article should be interesting enough to make them read the whole article. If you come off as boring and arrogant, you can say good bye to your readers.
o Always find out a niche for yourself and concentrate on it. The more you write on your niche topic, the better response you would get. The more you get published, the more you would be respected and that would ultimately earn you
o Writing is good but you should also be able to rewrite what you have written. If you are a professional ghost writer, it is all right but if you are not, you should always ask for the right to re-sell about 50% of your work.
o And never forget to have fun. Have a day off. Write about something you like. It could be poetry or an article for some cause dear to you.
There are two things that you would need to be successful in the field of online writing. Writing skills is but obvious but perseverance is also required. And once you gain fair amount of experience you could also try for newspapers and magazines.