Clothes and sundries, accessories and toiletries.
Socks and underwear on the bottom, along with whatever pajamas or loungewear that feel appropriate for a visit.
Rolled pants and shirts (rolling will actually keep things less wrinkled in most instances).
Maybe a book if I’m carrying the bag with me.
Sometimes a gift or two, depending on the host.
The most important thing to pack though, and you don’t even need a fancy bag for this, is an open-minded readiness for anything, and a willingness to try everything. It is the essence of a good traveler.
