While packing for your traveling do not forget to take your health with you. Travel, whether domestic or foreign, has a chance to make you get sick.
So the best tip is to take your prescribed medication with you and copies of your actual prescriptions. in the prescription bottles.
You might consider additional over the counter medications as well. Do not forget to check the policies of the country you want to visit as some nations prohibit over the counter medications. Also remember to check for the common diseases, weather, and type of insect for your destination.