Writing articles is an efficient SEO technique to promote a web site. People use it to raise the link popularity and then PR of a web site as a end result. It would be simple for you to find  some topics to write for at the very beginning. But sooner or later, you will find a situation that you cannot find anything to write about, and a lot of time will be spent on finding a topic as an alternative of really writing some valuable content.

Below are some very effective ways of what I am using now:

1. Find Topics from Helium
You can find great topics from Helium. As a web site where information rules, people in Helium are required to share their information under the given topics, and those topics could be the potential one you can write for. But how to find out the topics which have close relationship with the content you plan to write for? There is a easy way you can follow. A search tool is offered by Helium, you can type in the key word related to your web site, system will show a list of topic from Helium which are associated to the key word. And you can review all those topics to observe what you can write about. The extra benefit here is that even you don’t know the answer for those topics, you can read through what the others have written about and then come out with your ideas. How  painless, right?

Another big thing about Helium is that you can write for it and get paid when each time your articles are read. Even it’s not a important thing, but you still can make some  money.
Find the topics from Helium has become the most important way I have used to promote my web site, and this is really very powerful.

2. Publish review for latest news in your industry
People tend to write the guideline under some detailed knowledge area, but guideline is guideline, you cannot find out a lot of topics about it. So, writing review for the new events in your business is a good idea. And there are always some events happening, so you will not be in the situation that lacks of materials.

3. Others
Other methods you can leverage. , If you also use Blog to support your business, you can get  ideas from the remarks of your visitors left in your blog. But from my viewpoints, the first 2 methods will be able to keep you sufficiently busy. And the content you have written are  what people are looking for.