Research, research and even more research.
Ever since I have developed a laser like focus on providing value whether it be providing useful information, innovative solutions or just some witty humor the response has been extremely encouraging. More people leave comments and click my hubs up, follow me and leave fan mail.
Whatever you write about you really have to prove that your an authority on your topic, and you have to do that with the quality of your content.
Also I don't do the hard sell, you will rarely see Amazon products on my hubs unless the products are completely relevant to my content and useful and good value.
I am always on the lookout for great info that saves people money or solves very simple yet silly problems or provides some inside information on how to get a product for a special price.
This all means expending a little more effort, but the results are well worth it!