Acquire two new passport photos. These can be shot at some retail drug stores and photography studios. The government has specific size and resolution requirements for passport photos--it's easiest to have qualified professionals take these for you.
Fill out the appropriate forms. If you plan on applying by mail, your current passport is undamaged, you are over 16 and your name hasn't changed (or you can document the change), fill out form DS-82 . Otherwise, fill out form DS-11. You can get these forms online or in person (from the post office or other passport acceptance facilities).
Gather the necessary fees. As of August 2009, the fee for renewal (non-expedited) was $75. This amount may change. Use a check or money order for the fees if mailing in the passport renewal. Do not send cash.
Make photo copies of your current passport (the inside pages, which contain your information and passport number) and store in a safe place. This is important in case your passport is stolen or lost in the mail.
Place your current passport, the completed form and a check or money order for fees in a protective envelope (one that will protect the passport and forms from moisture) if you are mailing your renewal. If you are renewing in person, bring your passport, your forms and fees to your nearest passport acceptance facility. You can locate your closest facility by searching on the U.S. Department of State's website.
