Content that lasts tends to be evergreen (timeless), novel (not yet extensively-covered), and presented with a specific, niche, long-tail title.
The best titles are short and descriptive. They should be on subjects you're passionate about that are not already extensively covered online.
A boost in quality can lead to a boost in traffic, readership, and earnings. Here are our top tips on improving the quality of your articles (complete with before/after examples).
Because your articles are public and available for the world to see, there is a chance that someone might copy and republish them. Here's the HubPages guide on what to do if your work is stolen.