The heading pretty much sums it up; you really can never know enough when it comes to traveling. Now, as with a couple on this list and a lot of things on the internet, not all of the hacks are super useful.

Most of them are useful, which is all that matters if they’re able to provide you with something helpful. The tip about emailing yourself a scanned copy of your passport is just plain ingenious! The battery in the fridge suggestion is weird though.