Kind of cool to read but these are not any tips that a normal (non-paranoid) person will need to follow unless they are traveling to some seriously dangerous locations. Except maybe the tip not to use the hotel safe or leave money under the mattress, those are good. But do normal people really need to write their name down on pieces of paper and pass them across the desk with a wink to avoid their name being said out…
He doesn’t mention where you should keep your valuables. It’s easy to say where not to, but then offer a suggestion for a safe place to store stuff like a passport or cash.
For example, you might hide your cash or documents in between a framed print and its backboard. You might open the room safe and reset it to the default state with your passport in a black envelope taped snug against the back ceiling of the enclosure.
A committed intruder might find hiding places like these eventually, but it could take an unacceptable amount of time for them to consider it.