Anyone traveling to Portugal can buy nationally sponsored travel insurance that includes coverage, with restrictions, for full medical care, emergency medical evacuation and repatriation as well as, unlike most insurers’ policies, coverage when a trip provider cancels or interrupts a trip because of COVID-19. (A traveler canceling or interrupting his own trip due to fears of COVID-19 will not be covered.)

The insurance provides coverage only on mainland Portugal and in the...

With the Radical Storage app, free for Apple and Android, travelers in cities in more than 70 countries can find locations nearby that will store their bags for small fees. Each bag stored with Radical Storage is insured up to €500 (near $592).

To use the app, open it on your smartphone or tablet and choose from one of the nearby drop-off locations that appear, then pay the fee, typically about $6 per bag per day, take your luggage to the location and show the code provided by...

Visitors to Japan can get a reloadable PASMO Passport smart card with which to easily pay for public transportation and some taxis and for purchases at some vending machines and stores (look for the “PASMO” logo at checkout).

The card can be purchased, after a passport is shown that confirms the holder is a traveler, at Haneda and Narita airports and at many Tokyo Metro stations for an initial cost of ¥2,000 (near $19), which includes a ¥500 fee and ¥1,500 in...