When you are deciding what you are going to write one or more articles about, you first have to consider what you can talk extensively about. It is always easiest to write numerous quality articles concerning something about which you have a lot to say. If you have always had a passion for cars and you work in the auto industry, then there is no reason that you should not be able to write a series of articles about all things cars. The potential is there for up to fifty articles, easily, that could all circulate around the Internet simultaneously.
It is important to tie your expertise to your business in some way. This can be either very easy or very difficult, depending on how well they match up. If they are the same, then obviously there is no issue. If they are, for instance, an expertise in weaving and a business in card-making, then you can still tie them together loosely. If you cannot find a way to tie the two together, then you might have to look beyond your expertise and do some research into the technical aspects of your business so that you can write about that.
Even if you are writing about something that you know, research may be a good idea. It can give you figures and facts that make it much more obvious to your audience that you know what you are talking about. It can make the articles easier to write, as you will have more raw material to work with. Although research does take time, it raises the overall quality of your articles, which increases their value to you. Basically, it is an investment, and you have to decide for yourself whether or not it is worth the time.
Remember that you want people to respect your article for several reasons. If they like it enough, they may feature it on their own websites. Even if they do not do that, they may be interested in learning more and will click the link at the bottom of the article and be taken back to your website: mission accomplished.