Ever wonder who owns a particular domain or which company runs it, it is an easy stuff to find out. At http://www.domaintools.com , you can get details about the person or company that owns a particular domain. If you paid someone to register your domain for you, this is a great place to check if the domain was actually registered in your name or in the name of that company or person you paid to.
If you have a domain name, check now and see if you are the real owner or not. Have some other domain tools tips to share, feel free to have a say.