Jet lag happens when your body's internal clock, which controls your sleep cycle, gets out of sync with the time at your destination.
To avoid feeling tired and sluggish, try adjusting your sleep schedule a few days before your trip, getting more sleep or waking up earlier based on the new time zone.
Using online tools like Jet Lag Rooster can help you create a plan for gradually shifting your sleep patterns.
It's also important to get enough sleep before your trip, as being sleep-deprived can worsen jet lag symptoms.