Traveling on a flight and plans for a long trip? Remember that liquids over 100ml has to be checked. In the case that you are traveling with only carry-on luggage, be sure to plan which cosmetics you are going to be bringing ahead of time.
For my next trip, I bought all travel sized items from the local Walgreen store. Items such as toothpaste, shampoo, hand sanitizer, and more are bought as travel sized. Most of these items that I bought are refillable, so I can just keep these items for multiple trips.
It is also wise to all the hotel at your destination to see if they offer items such as soap, shampoo, etc.. it would definitely save you some space on your luggage if they offer those item already at the hotel or lodging.
I usually carry an empty bottle so that I can fill with water once I pass through the security checkpoint. The bottle are important for me too because I can use it for drinking water while walking around town or doing the morning jog at my destination.