Be careful about your reader
Always write keeping in view the audience for which you plan to write. In order to write an article for newspaper, be ready to write for a diverse audience. The newspaper articles are usually read by a large number of people. So be very careful with your words. Never write something that seem biased to one sect of society. Always be sensitive to what would be impact of your words upon the audience.
Remember you are writing an article for the newspaper, so give special attention to the content. Write freely but do not forget to proofread the paper thoroughly. You can do this with the help of a proofreader or proofreading software also.
Review and edit
Do not just consider your first draft of writing final one. It is better to review your work and make necessary additions or deletions. If possible, rewrite the stuff or make major editing in the work. It can be tough but the newspaper article is worth paying a lot of attention into it.
Get a good dictionary
Always keep a check on your vocabulary. Enhance your word choice and selection of appropriate phrases by reading a lot. Keep a good dictionary close to you always. Never use the word if you are in doubt about the meaning. So instead of taking a chance, check its meaning in the dictionary.
Improve your general knowledge
In order to become a successful newspaper article with a lot of fan-following, focus on your general knowledge. Try to learn things which are happening in the world. Keep yourself aware of what is occurring around you. Watch daily news and read newspapers as well. Do not become an ignorant fool and write after getting detailed information about a topic.