You know you travel too much when...
You know where your passport is at all times and can get it at a moments notice,
You regularly receive emails from family members in which they ask what country you are currently in,
You do about as much reading on the way to the airport and in the airport as you do in the library,
Your suitcases always seem to be in varying states of being packed, repacked or unpacked,
You regularly have three different currencies in your wallet,
The flight attendants on Easy Jet start looking familiar,
You know the best place to get tea at three different airports in two different countries,
Your plane tickets are usually your largest monthly expense,

You know you travel to much when you start making lists to that very effect.