Brian Christian, computer scientist and co-author of "Algorithms to Live By: The Computer Science of Human Decisions," says probability can help us decide when to try new things and when to stick with the familiar.
It's called the "explore/exploit" problem. ("Exploit" here is a computing term that basically means "savor.")
"One should generally be more exploratory at the start of a vacation ... and more 'exploitative' at the end," he told Business Insider. This is because your chances of finding a place, meal, or experience that you like better than the ones you've already tried go down as time passes.
Everything is new on Day 1, so embrace that. By Day 7, you pretty much know what you like, and even if you make a great discovery, you won't have time to come back. So savor your favorite things.