Oh, this is a fantastic topic! There’re always so many questions. In general, the answer depends on many factors: what size is your suitcase, what shape it has, where are you going to go, for how long and what weather will be there. And this is not the whole list. But let me give one way, which, in my opinion, will be useful to any traveler.
The best way to pack everything in one bag is to use every inch of space. For example, shoes should be stuffed with socks. Always put it in the part of the suitcase closest to the wheels. This will help to avoid unnecessary toppling of your luggage while standing. Then put light clothing rolled together.
This method helps not only to maximize space but also not to wrinkle things. Then add bulky items such as sweatshirts and warm clothes. You can also use small-sized special packing bags. First, you put things away in them, and only then in the suitcase.
An alternative to the usual packing is the frontal method. Put your belongings in a suitcase so they are like files in a drawer. Instead of digging through horizontal layers of clothing, it’s easier to see what you need at a glance.
And don’t forget about your pockets. If your suitcase has external pockets, use them for items that need quick access. For example, put slippers, a change of T-shirt, or a bag of makeup in there.