I was doing lots of "domaining" but noticed that I was "domain binging". Ended up registering hundreds of domains.
Now, I am turning to developing the good ones and that will automatically create values for them. If you have lots of domains, you cannot develop them all, so I park some good ones at whypark.com as "spider traps", for the time being.
The really good ones, I wll put $$ into developing them, more time consuming but its definitely more worthwhile!
Good luck...Al.