Be aware of the time change when traveling

This is a biggie. For example, when you travel from the U.S. to Australia, you arrive two days later and actually miss an entire day.

From Guam to Honolulu, you arrive the day before you departed Guam.

When you fly from the U.S. to Europe you usually arrive on the next day, except for day flights which arrive on the same day.

When you fly East from Europe to the U.S. you usually arrive the same day. it is just a very long day.

When you fly from Australia/Asia to the U.S./Canada you usually arrive the same day, but the time is earlier than when you left. You cross the International Date Line is the reason for this one.