This advice is twofold: Wear layers and pack in layers. First, your on-the-road wardrobe should feature plenty of layers, which will help you jetset through multiple climates in style and comfort. Second, the items in your bag should be packed in neat layers for easy screening. According to the TSA, "Pack items in layers (shoes one layer, clothes one layer, electronics one layer, etc.)" so that the security agent screening your bag can get a clear picture of what's inside. The faster the TSA agent can screen your stuff, the faster you'll get through the security line.
However, there are a few applications that business travelers can complete online to become eligible for special expedited security or customs programs to guarantee a slightly better airport experience every time. The most widely known of these are TSA Precheck and Global Entry. However, there are some differing views across the Internet on the pros and cons of these, so best to do some research if such opinions have stirred some skepticism in you. Big names fall on both sides of the debate, like USA Today or Skift for these programs, and Business Insider and Scott Mayerowitz of Associated Press against them, so, best to educate yourself, scout out some objective comparisons, and decide for yourself.
It's tempting, on that first daunting trip away, to get everything locked in – every hostel, every transfer, every breakfast, lunch and dinner. That way you don't have to worry about anything, right? But you'll soon come to realise that it pays to have some flexibility. Book in the big things, sure. But also leave yourself space to change your itinerary and take opportunities as they present themselves.
One of the first lessons I learned on the road was that your plans will nearly always change. You’ll arrive in a place and hate it and want to leave immediately, or you’ll fall in love with a destination and want to spend longer there. You’ll make friends with a group of awesome people and want to change your plans so you can travel with them for longer, or you’ll find out about an amazing town that’s nearby and want to head there instead.