Personal Stereo

Only you know whether a personal stereo is essential for you. If it is, be careful where you use it - people wearing headphones are generally less aware of their surroundings, and thieves know this. The right music, though, can be a sure cure for homesickness.

Whistle

A whistle is essential for long-distance walkers and campers who head off the beaten track. Also not a bad idea for single women, as part of a key chain or on a necklace, just in case.

Calculator

Some sort of calculator is useful mainly for quick currency conversions. It doesn’t have to be anything special: the smaller and cheaper the better.

Deck of cards

Cards are a great conversation-starter and time-passer on long train rides, rainy days, quiet nights, or when you just can’t face another museum.