Your Domain Name can also be Your Website Name
Naming your site after your domain may seem obvious to some of you, but you'll be surprised to learn that not every website is named after
the domain name even when the webmaster owns that domain name. Naming a site after its domain name is important, for the simple reason that when people think of your website, they'll think of it by name. If your name is also your URL, they’ll automatically know where to go. For example, when people think of thefreecountry.com, they don't have to wonder what URL to type into their browser to get there. The name of the site is also the URL.
Size of the Name
Domain names can be of any length up to 67 characters. You don't have to settle for an obscure domain name like avab.com when what you mean AcmeVideosAndBooks.com. Having said that, there appears to be some disagreement about whether a long or short domain name is better. Some argue that shorter domain names are easier to remember, easier to type and far less susceptible to mistakes: for example,"getit.com" is easier to remember and less prone to typos than "connecttomywebsiteandobtainit.com". Others argue that a longer domain name is usually easier on the human memory – for example, "gaepw.com" is a sequence of unrelated letters that is difficult to remember and type correctly.
Character types
Just a reminder: domain names can only use letters, numbers, and hyphens ("-"). Spaces and other symbols are not allowed, and they cannot begin or end with a hyphen. Domain names are not case sensitive. Most domain names cannot exceed 22 characters, not including the extension.
Avoid trade marked names
There are two really good reasons for this. First, it’s not very nice. We have all heard the stories about the zany guy who thought ahead and bought "some-huge-multi-million-dollar-company.com" and sold it to the company for enough money with which to retire. But, remember that those companies have spent lots of time and money creating their brand, and you wouldn't like it if the tables were turned. The second reason to avoid trademarked names is that companies are no longer opening their pocketbooks to get their names back. They are calling their lawyers. Also, pending legislation will soon make it very difficult to register someone else’s trademarked name.