1. Avoid a lot of back story

2. Simplify your sentences wherever possible.

3. Avoid adverbs for the most part.

4. Avoid using the same word over and over in a paragraph.

5. Don't overuse names.

6. Limit the description in a dialogue tag.

7. Avoid participle phrases

8. No idle chit-chat.

9. Minimize use of the passive voice.

10. Use active, descriptive verbs.

11. Minimize use of the verb "to be" to keep the word count down.

12. Cut the verb preceding an infinitive if it's not needed.

13. Avoid using the word that when you don't need it.

14. Watch for pet words or phrases you tend to favor without even realizing it.

15. Avoid stall phrases that slow down the action for no good reason.

via ezinearticles