Genre. Choose your genre well. Write in the areas you know about rather than be tempted by markets which you may think offer big returns but which you are not really comfortable with. If you enjoy what you write this will show through in your work.
Humour. When appropriate try and inject some humour or light relief into what you write. This could be an anecdote, a quote or curious fact but its inclusion can help to make your writing more enjoyable and illustrate points in a more memorable way.
Ideas are essential to a writer and ideas are all around. Observe what is going on, look to newspapers and the media for inspiration. By being aware, by wondering, by asking ‘what if?’ you will find ideas coming more readily.