Smart packing is a skill every experienced traveler knows. Here are the principles:
5 socks, 4 shirts, 3 pants (including the pair you're wearing), 2 shoes, 1 jacket.
Merino wool or technical fabrics — dry in hours and can be washed in the hotel sink.
Clothing organizers compress clothes and organize your bag. A revolutionary change.
A multi-functional shoe suitable for hiking and dinner alike.
Use an app like TUlon to manage your packing list — you won't forget anything, and you can share with the rest of the group.