The most useful tool for figuring how how far away two airports are.
Did a few of these things and they were great.
awesome website (japanese only) for finding open seats on reserved trains
A search engine for "hidden city" fares.
Timatic is the system that airlines use to determine who can/can't board. It's probably the single best thing to look at for concise description of boarding requirements.
"Yugoslavia" passports were valid through 12/31/2011 — nearly twenty years after the country ceased to exist!
"At least 20 people this summer -- most of them Japanese -- have suffered from the disorder after realizing Paris isn't what they expected." A disorder that happens when you go to Paris thinking it's gonna be awesome and it isn't