Dictionary Word Value
When your trying to make a profit from domaining, it is extremely important to know what brings in the money. There are many different factors that persuade buyers to purchase a certain domain name. These include relativeness/keyword similarity to their business or what it specializes in, resell value is higher then what your listing it for, and a bunch of others that go on and on. The main thing to keep in mind however is that the domaining business is really random, and it is very hard to predict what will sell.
Made-Up Words
It has been countlessly said that creativity is the key to success, well in the domaining business that is only partly true. On one side, it does take creativity to find and search for a domain that will sell. However it really matters what your definition of creativity is. The kind that I am talking about, is making up words that are similar to what the purpose of the domain should be. For instance, if all of the good poker domain names with the .COM extension are gone, you could make one up such as Pokerono.