Local currency (Czech Republic, Egypt, Italy)
It’s easy to get confused when you have to deal with unknown currency. That’s why before going to a new country you need to research what kind of currency it has, what it looks like, and what notes are in circulation right now. For example, in Italy they can give you change with Italian lires instead of euro cents, while in Czech Republic you may receive Bulgarian levs instead of Czech krones. At the market they also like to write prices without specifying the currency, so always check before buying!
Helpers (Egypt, Bali, Spain, China)
People will approach you with all kinds of suggestions – either show you the way to the place you’re going or help you carry the bags in the airport. Please mind that all of these services aren’t free at all and there’s a hefty sum of money these ‘helpers’ will demand afterwards. When it comes to luggage, it’s best not to entrust it to strangers, anyway.
Sim card (India)
If you want to get a working sim card in India you’ll have to fill up quite a few forms and then wait a few days before it gets activated. If you’re buying a card and they don’t demand you filling up the forms, along with 2 passport-sized photos and some signatures, it’s definitely a scam and your sim card will stop working really soon.