When you are looking to start a new business online, you need to think of the domain name before you do anything else. This is the name that people are going to see when they enter your website between the www and the extension name (.com, .net, .org, etc). The biggest problem with this kind of thing is that you are going to have to consider the importance of looking for a domain name that is easy to remember and convenient or printing purposes too.
The best domain hosting services provide a system that allows you to see if the name you want is available in the extension you want to use. The .com names continue to be the most popular, but there are also other extensions like .net that are just as good.