As I have said before, domain reservation is important for your business because you wouldn't want anyone getting ahead of you, would you? So, if you have already thought of that name that you think would sell reserve it right away. Even if you don't have the money to run a web page yet. At least you already own the name and nobody has the right to use it anymore. It's like reserving a room in a
hotel in Spain, you need to ensure that it will be available for you on your chosen time.