It's well-known that even if you have a 40 kg business class baggage allowance, your suitcase can only weight 32 kg maximum due to safety restrictions on what handlers should be lifting. How do you maximize this allowance if you only have one suitcase?

Imagine you're overpacked with some extra heavier winter or hiking clothing, and then you buy a few things before flying home.

Do you simply see if your hotel can help you and provide a small box and packing tape to pack 8 kg worth of items, and then handcarry a couple more jackets? Any tips?