It is important to consider the purpose of a domain name while choosing a name. It must provide an easy way to reach your web site. The best domains have the following characteristics:
Short – Make it short as people don't like to type! A short domain name is easier to type, read, and remember.
Meaningful - A short domain is nothing without meaning, i4y9r.com is not easy to enter or to remember. That’s why you have to choose something that relates to your website and its content.
Clear - Clarity is important when selecting a domain name. Avoid a name that is difficult to spell or pronounce.
Exposure - Search engines index your site and rank it for relevance against terms people search for. In order to maximize your sites exposure, consider including a relevant search term in your domain. Of course, only consider this if it still maintains a short, clear and meaningful domain name. Names that are short and easy to remember are an asset.