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.
Do not panic!
If possible, do not use hyphens.
If possible, do not use numerical characters.
If possible, do not use mobile phone text message abbreviations.
If possible, do not use '2' for 'to', '4' for 'for', 'u' for 'you' and 'ur' for 'your'.
Do not try to be too cool by using deliberate spelling mistakes. It's just not kool!
If possible, do not pad your domain name with unnecessary words like 'the', 'ltd' and 'company'.
Do not use brand names or trade marks which belong to other companies.
Do not use a limited (incorporated) company name which belongs to another company.
If relevant to your business, also consult a Company Formation agent.
If you use more than one word, do not end and start words with the same character. For example, www.intelligenttelephones.com is not
good, whereas www.businesstelephones.com is good.
Do not pay over the odds, because there are hidden charges to avoid.
Consider the following when selecting your domain name!
Keep it short.
Make sure it is easy to spell on the phone
Make sure it is easy to pronounce on the phone.
Use simple and plain English.
Use real words from the dictionary.
Use search engine keywords.
Keep it descriptive! Use words which describe exactly what you do.
Keep it simple and don't confuse your audience. What is this? www.shoeswearing.com Is it 'Shoe Swearing' or 'Shoes Wearing'?
Cover your options and buy more than one domain if you need to.
Only index one domain per website on search engines, if you wish to avoid diluting your search engine ranking.
Use a popular and mainstream domain extension.
Choose the right domain extension for your market or country. For example .COM for International; .CO.SA for Saudi Arabia.
And finally, check your spelling before start providing us the domain name .