well, here are the things i bring for carry-on:
water bottle
hand sanitizer
gum/candy, etc
phone/laptop
headphones/earbuds
wallet/carry-on money just in case x3
something else to do (book, sketch book, etc)
Clorox, or other sanitizing wipes (im a germ freak, so i bring that XD)
CHAPSTICK. I SWEAR YOU. WILL. NEED. IT
try to stay clear from things such as small itmes or what-not, fidget spinners, anything that clicks loudly. i got a fidget spinner taken away from me on a plane once x3
AAAAAAAAAAAAAAAAND, whatever else your heat desires!!! :)
HAVE A GOOD TRIP, BEST-O FRIEND-O