The most important questions to ask yourself are: do you need to obtain a new US passport, or does your old passport need to be renewed?
The routine processing time for a passport is 4-5 weeks, while the expedited processing can take 2-3 weeks and cost an additional $60. If you are really in a rush, the best option is to get it expedited at an agency where it can still take up to 5 days. According to the US State Department, you should renew your passport approximately nine months before it expires if possible. Whatever your situation is, it’s important to remember that this is not something you should leave till the last minute!
If you do need a new passport, you can fill out an application for a New US Passport Application Form DS-11 online. For more tips on filling out the form, check out the video below. Otherwise to renew a passport before its expiration date, you’ll need to fill out Passport Renewal Form DS-82.