While some swear by rolling up clothes to save space in a suitcase, Tan believes it's a misconception and prefers to fold.
"I start with my shoes — I usually pack two pairs if I'm going away for four or five days and I'll wear another one. I'll put them around [the walls of the suitcase] and it creates a kind of valley. I'll put my socks in my shoes to use the space wisely and I'll put all my underwear in the top flap because you can lay it out and not use much room.
"I fold, fill in that valley, and on top I put the things I need to make sure don't wrinkle."
And although you might expect the style guru to dress up for flights, he prefers to travel in comfort and thinks people who make too much effort are "insane".
However, for Tan, it's all about travelling in comfort without sacrificing style – and the item he packs for every trip is a stylish pair of comfortable sneakers.
"I think people expect me to go in a floral shirt and my boots that I'm always in. That's not the case.
"I want to look nice; I want to look stylish. But I will wear my most stylish sweats, sneakers, T-shirt, and hoodie."
So take note – sweatpants are acceptable, just make sure they're nice and clean.