Can’t Pack Too Many Pairs of Underpants
Unless you’re not potty trained, there’s absolutely no reason to pack your suitcase to the brim with hundreds of pairs of underpants. How many underpants do you think you’ll actually need for a week-long trip? For the most part, you can wear the same underpants four times—just flip it inside out and flip it backward.

Also, if you pack too many pairs of underpants, then you won’t have any space for the jeans you never wear or the ball gown you purchased during your princess phase. So, before you leave for the airport, make sure you pack smart. Bring only one pair of underwear for every ten pairs of jeans you take with you to save space.