There are two types of people: those who count down the days until vacation and pack their bags weeks in advance, and those who do everything at the last minute. No matter how experienced you may be as a traveler, you have to prepare for your trip in advance. If you are planning a trip for more than a week, it is better to pack your bag right in advance.
Make a list of things you need and break it down into categories. For several days write down everything that comes to your mind. That way you won’t forget an important detail. It works! You can also make it the basis for your next trips, changing only the smallest things.