We would have called ourselves experienced travelers but there are always things to learn.

1. Even if you have used an airport dozens of times for international travel, be sure to confirm which terminal your flight departs from. We started in the International Terminal at SFO, not knowing that there are now two—at opposite sides of the airport. The only way to get from one to the other is a 30-40 minute walk. Thank goodness we had allowed plenty of time.
2. Even when your agent and the airline sell you an itinerary with a connection in a foreign airport, double check that it is doable. For example, a 90 minute connection at Heathrow via British Airways sounded reasonable; now we know we would have had only the tiniest chance of making it. “Luckily”our initial flight from SFO was on the ground an extra two hours due to a customer incident so our initial 90 minute connection was not to be and British Airways automatically rebooked us to a later flight to Rome with a 3 hour connection. It took more than 2 hours to get from arrival gate, passport control, security (agonizingly slow even with light traffic), and to find which side of the very large and crowded concourse our gate was…and…
3. Do not assume the departure gate information is correct. When we arrived at SFO International Terminal our departure gate was posted on the boards as G2. We left from A11. (When we asked about this the answer was “oh, you cannot trust the board.”) And at enormous Heathrow gates are not even posted until 30 minutes before boarding time, probably why we saw so many people literally running down halls looking panicked.
4. Do not expect new processes to work well. Europe is instituting a new biometric system to track visitors which entails photos and fingerprints. How hard can this be? The Rome Airport is riddled with brand new kiosks and signs instructing foreigners to stop at a kiosk to preregister. Kiosks which were all blocked off until right before passport control. Why quickly became obvious—the kiosks are incredibly slow, so slow that they are difficult to use. Attendants wandered the crowd helping travelers follow the instructions. In the end it was pretty simple, but the learning curve was steep.
5. Just because there are elevators doesn’t mean they work. Especially when you are hauling baggage.

Enough said. We made it.