What to pack? How to pack it? Or what to pack it in? What they'll let you carry on, and what will force an embarrassing holdup at the gate? This week travel blogger and YouTuber, Kristen Sarah reveals the secrets to packing like a pro. She'll tell you when to strap on a backpack and when to roll out a suitcase. How to fold your clothes to make everything fit and the best way to organize your bag. We’ll give you a hint: You can’t pack the heat.