Having going through namepros.com this morning, I found this below article and I see it as a very good one for newbies and even old domain investors as a good guiding material to get good domains that could sell nicely.
The material was posted by @Bannen; also a namepros member. He posted the article in his response to a namepros member @Fastfingerz's previous post seeking to acquire knowledge on “How to Discover Trending Niches for newbie's”
I love the material as it is filled with good ideas and for educational purposes. I recommend the material for my members who are yet to read it. Please follow this link for full text.