Write down the name of your business. Remembering that short and sweet domain names are the easiest to remember, create a list of possible names using your business name (for example, smithauto.com, smauto.com, smitheys.com).
Create a list of services your business provides and a list of possible names from those services (for example, autorepair.com, fixcar.com, brokedown.com).
Use catchphrases from your brochure and other promotional materials to create additional possibilities.
For personal domain names, use your name, your pet's name, your hobbies, your surname or even your child's name.
Use other organizational suffixes, such as .net or .org, if the .com name is taken. However, since users randomly searching for your site may be directed to the .com site first, .net and .org names are usually best for personal rather than business domain names.
If you're really set on using a domain name that has been taken, contact the owner of that domain name by checking the Administrative Contact section on the Whois site. Domain-name owners sometimes sell domain names they don't use.

Write down the name of your business. Remembering that short and sweet domain names are the easiest to remember, create a list of possible names using your business name (for example, smithauto.com, smauto.com, smitheys.com).

Short Length of the domain name is good and everyone can remember it. But it should represent your business name and short for of your business.

Do not use an ampersand '&'. Technically, it is illegal, so you should also avoid 'and'.
Do not use apostrophes. Technically, it is illegal and therefore the use of an apostrophe is not permitted.
Do not start or end with a hyphen (-).
The permitted characters are: abcdefghijklmnopqrstuvwxyz 0123456789-
All characters are lower case.