An important part of LLC formation is the registered agent. A registered agent must be a person who is located in the state in which you are forming your LLC. This is the person you designate to receive legal service of process, as well as government forms and notices, on behalf of your LLC. He or she must have a physical street address (not a P.O. box).
In a few states, you must take an additional step to make your company official: You must publish a simple notice in a local newspaper, stating that you intend to form an LLC. You are required to publish the notice several times over a period of weeks and then submit an "affidavit of publication" to the LLC filing office. Your local newspaper should be able to help you with this filing.