As domainers attend convention after convention trying to get validation from others who are trying to do the same thing, very few domainers are actually making money and its probably because of the huge supply of domain names and ideas of what makes a good domain name. The key is in monetization.  Not parking, and not necessarily in full blown web sites.  Parking commissions are extremely low and to build out a web site for a domain can be very expensive once you add in SEO.  Moguling bridges the gap.  For between 29.95 per month and $99.95 per month, there is a nice option for those domain names you own that you should be reinvesting in.  My personal experience is that domain names are probably more than 100 times more likely to get offers, and much bigger offers when you can package traffic and rankings with the domain.  With the $99 option you actually get original content to go with a blog content management system.  The tool has automatic SEO built into it and after about 2 or 3 months, your domain names can be at the top of the search engines for some pretty competitive 2 and 3 keyword phrases!