Before you hit the road, catch up on the entry requirements for your destination(s). These vary from country to country, so make sure you're aware of the requirements for each of your stops.
You can find everything you need in both your online account and the mobile app. Under "Entry requirements," you'll discover info about health forms, important documents, COVID testing, vaccination policies, and more.
Use this resource to fill out your to-do list. That way, you'll be ready for anything that comes up when entering a new country.