Blackberry
In the past three weeks:
I have visited three countries.
I have been to 4 airports (one of them 3 times, as I went out for the day while waiting, and returned home through it), plus a bus terminal.
I have slept in 9 hotels, 2 of them twice
I have visited three large cities, 7 smaller cities, and a suburban town
I have been to at least 36 meetings in and between the different towns (plus miscellaneous restaurants and one museum along the way), using 6 different trains, two boats and three different cars.
Throughout, I managed to hang on to far too much stuff, including binders full of documents, stacks of business cards, a bunch of borrowed electronics and literally bags of money
Yet somehow, I managed to lose my blackberry between my last meeting and the airport.