Your website is the face of your business and the domain is the first step. Choosing the right domain will give you instant recognition with your customers. The right name will set the tone for your business and help you to be found.
Most people go for the .com domain because it's most common and easy to remember. The problem is that most of the good .com domains are already taken. In that case it's best to check if the domain you want is available with another extension, like .net or .org.