What it takes is a commitment to write a few articles per day. Moreover the idea of making money out of them should easily motivate you to write several articles per day. In the quest for writing articles consistently and effortlessly we find that many people or writers resort to different techniques.
Type-1
The worst thing I have seen is those people who simply check for new articles posted very recently and related to the topic they are looking for. They simply copy paste those articles either in their blog or for an article submission site. Both are basically meant to make money through different routes.
Type-2
There are some people who look for news articles or other articles from different source mainly as a reference than to copy/paste them. These people either simply rewrite the article, or use the ideas hidden in those articles to write their own or they may learn things from them so as to write a new article at a later date. Generally these people do not look for specific topics but look for whatever interests them at that very moment.
Type-3
There are others who have knowledge in either a wide variety of topics or an in-depth knowledge in a particular field and hence they find it easy to write on whatever topic they want to write. These people write articles out of their imagination or ideas or their daily life experiences. These people often are satisfied with their work and their knowledge and often involve in discussion with people who want to learn from them.
These are not the only type of people who write several articles per day. But there are still several people out there who write regularly and quality articles. I would be happy to get input from the reader about the other types of people who consistently write articles.