How do you trademark a name?

I highly suggest using an attorney or a trademark service. If you try to do it yourself, you're just going to run into a lot of headaches and red tape. (Been there, done that.) This site (a href="http://www.4trademark.com)" rel="nofollow"http://www.4trademark.com)/a offers trademark services for pretty cheap or you can call a local lawyer in the yellow pages and see what they charge.