1.)  Identify first what your business provides.
2.) Who does this business serve?
3.) What is your mission statement? Does it mention your business name, your services, your goals?
4.) Identify the words that describe your business

Then you are going to want to do your keyword search with the words you came up with.  You need to choose the words that have a lot of hits. The important point in making your online business presence a success and in using keywords is that these ‘keywords' are words that should be in the title of your domain name if at all possible, in your mission statement, in the copy of your website, in your description.  By doing that The Search Engines will not have to search as hard and you could be one the first page.  I hope you will find a perfect Domain Name for your business.