What's the easiest way for me to renew my U.S.?
The biggest challenge are the photos. If you have two recent photos that satisfy the guidelines (they are pretty strict, but you can check them online), then you can fill up the application online and then mail it with a check. If you dont have photos, you may be able to get them at the same US Post office where you can file your application in person. You do need to make an appointment. You can still download an application and fill it out before you go to the passport office.