Things to consider when choosing your domain name are:

Advantages in choosing a name relating to your business activity is that anyone looking for your type of business will key related search terms into the major search engines and results will have the matching search terms highlighted in bold, including those in the domain name.
However, this is a popular method of choosing a domain name, so availability of your chosen name may be limited.

3. Hyphenated or not?

Should your domain be an unbroken word or phrase or should the words be separated by hyphens? Non-hyphenated domain names can be easier to explain over the phone for instance and easier to remember. However, they are increasingly in very, very short supply.

Hyphenated domains are more difficult to tell people,or explain over the phone, harder to remember and may not look as good on your business cards. Also they may be harder to establish as a brand name. The upside though is that there is much greater availability and choice.

Be careful though of choosing something too long for example; www.web-hosting-website-design-cheap-websites.com.
Some experts say that hyphenated names are beneficial in obtaining good search engine rankings but overall, the major search engines are wise to this and the effect of keywords in the domain name is fairly small. There is no substitute for well crafted website content, and high quality inbound links.