For the past 15 years, each year I have been in the last country for 2 to 3 months and each time from about 1 week to 1 month. After many years of experience, I only carry enough necessary documents, don't bring extra, and strengthen measures to prevent documents from being dropped, lost, or misplaced. Types of paper I bring:

Passport/Passport

Contains personal information and information authorized in the local country. I only bring my passport and not my Vietnamese ID card because the two have equivalent information to determine whether I am the person carrying that document, i.e. the form of ID. A passport also has Visa information so it is more complete than an identification card. And in addition, if you participate in a purchase and need to make tax exemption or refund documents, then the Passport is the document that people need, not the ID card. Not bringing identification also prevents your identity from being lost or misplaced. I will have one wallet to use in Vietnam with documents in Vietnam and one to bring with me when I go abroad. No need to stir-fry peanuts over and over again.

International driver's license with Vietnamese driver's license

If I intend to drive in my destination country, I will bring an international driver's license + a Vietnamese driver's license. If I don't plan to drive it, I'll leave it at home. A driver's license can also be considered a form of ID because it has your face on it. Most people check to see if the name and face on the card and the person holding the card are the same. For events that require registration, they mainly only need the name and email, then they look to see if the registered name is the same as the name on the document and the face on the document is the same as the face of the person standing there. I brought my Vietnamese driver's license because my international license is just a translation of my Vietnamese license. So in the future, the Vietnamese degree already includes English, so you don't need to bring an international degree. However, I still carry both.

Bank card

I usually bring basic payment methods: cash, credit card, Apple Pay and AliPay if I go to China. Almost everywhere in the world accepts international payments (VISA or Master credit). You can use your own card or a card in your smartphone such as Apple Pay, Samsung Pay, Garmin Pay or Google Pay.