[ITEM 2] QUESTION: Air travel: how to carry hand luggage without issues?

Proper preparation for carrying hand luggage will save you from extra expenses at the airport and conflicts with staff at the check-in counter. For "Air travel", it is useful to always have 2–3 alternatives (flights, hotels, route, as well as a spare set of clothes) in case of disruptions or delays. Plan B saves nerves and helps you adapt quickly if your luggage is lost or your flight is postponed for a day.

Carefully review the dimensions and weight limits for hand luggage established specifically by your airline, as low-cost carriers often use very strict sizing gauges. Measure your bag at home when it is fully packed rather than empty, so that wheels and handles don't cause you to exceed the allowed size. Liquids are permitted in containers of no more than 100 milliliters, packed in a single transparent plastic bag with a capacity of up to one liter.

Pack valuables, documents, electronics, your laptop, and necessary medications exclusively in your hand luggage, never checking them in. Wear your bulkiest clothing and shoes while going through security if your backpack slightly exceeds the weight limit. If the airline offers to check your hand luggage for free due to a lack of cabin space, make sure to take out your power bank and valuable items beforehand.