You want it to be one that will stand out and that will be easy to remember for the persons who plan on being recall guest.To get some ideas and brainchild,take a look at the various keywords that you have singled out for your niche to see if any of those have a catchy hoop.
You want it to be kind of "applied auto salesman" sound,rather than something that is boring or does not has onlye one original chime to it.For speciman,if your niche is "blah",you coult try "MegaBlah","Blah4u","HouseofBlah",or "BlahKingdom".
These will all be original,clarify what the hell are you niche is,and, most importanly,will be easy to remember. how easy your URL is to remember is the main so that your guest will not have any disturbance eturning and clicking on more affiliate associates!