How to choose a good domain for my website?

[Mr]

I want to choose a good domain for my website and I had tried to register some good domains but all are seems to be already registered

[Suba Sreenivasan]

we didn't get the normal words of domain, change the letter according to the sound, choose a domain name very short as it is possible, you domain name should contain less than seven is good for SEO,

[Anjali]

If the domain name is for a company, it should be related to company's name. It can be the full name or the acronym. If you are not able to get that unique domain name, try spelling variations. For eg. ABC Corporation Pvt. Ltd. can try for following domain names:
1) http://www.abc.com
2) http://www.abccorp.com
3)http://www.abccorporation.com
4) http://www.abc-corp.com
5) http://www.abc-corporation.com
The list may go on like this.

[Danielle]

Choosing the perfect domain name is very hard but taking the time to find the perfect name will be worth it in the long term.

Here are some tips for you:

1. Keep it Simple and Easy to Remember
2. Avoid Hyphens or dashes
3. Shorter is better
4. Use your company or Brand name
5. Once you choose the domain name, consider purchasing all relevant extensions (.com .biz etc)

For more details check out this article: http://www.danipa.com/blog/2010/11/20/ch...main-name/

[livewyre]

Not all the advice you will get is actually good SEO-related advice.
For instance choosing your company name as a domain name is excellent if your brand is already known by the clients/visitors you want to reach, but if people don't already know your name, it is a good idea to use a keyword in your domain. Your company name does not need to be in your domain at all from an SEO perspective.
Using dashes as word separators is fine and may get you a domain you want IE:
You may find jewelerynewyork.com is taken but jewelery-new-york.com is available...
You don't need to keep the domain name really short, you may need to be prepared to take a longer domain name to get one that fits your purposes - this is fine (as long as you don't go ridiculously long..). You may also consider .net instead of .com..
Think about how you can use the key search terms that you imagine people who will want to visit your site will use. IE. if you are providing a local service, you should use a geographical location in your domain cakesinaspen.com for a store supplying locally to Aspen.
I don't know if you are looking to make a commercial site or personal site or information site otherwise it would be easier to give more specific advice.