Registering a domain is one of the first things you need to do before launching a blog. Make sure you look at everything the domain registrar provides with your domain purchase.
For example, if protecting your identity on the internet is important, you will want to use whois privacy. Services such as Hover charge $15 per domain but come with whois privacy included. Others, such as GoDaddy, charge around $10 per domain; however, when you add on their fee for whois privacy, the overall cost is higher.