Paris (17)

For getting around Paris you have a lot of options - an efficient metro, the fantastic Velib' bike rentals - but taxis are a basic necessity for any business traveller. But taxis are far less plentiful than in London or New York, and it can be a hassle to find them late at night or outside the city centre. Save yourself the hassle and hire one by phone. The best number to use is G7's English-language service; it's much easier than using the French one!

When travelling on business always take your own Ethernet cable and USB sticks with you. Even when hotels have broadband connections, there is often a shortage of connection cables for some reason. USB sticks come in handy if you can't connect your laptop to a projection system when making a presentation.

The catacombs of Paris were created to house the overflow of municipal cemeteries as the city was expanding and being developed. Visitors can go seven days a week to follow a 1.5 mile trail past the remains of six million former inhabitants. It is remarkable, not for its ghoulishness; once the initial surprise has worn off, it is a place which I find really thought-provoking, and is useful as a contextualisation of one's importance in the world (and perhaps one's work?). An unusual way to spend a couple of hours, but a worthwhile one.

Whenever in a restaurant, especially if you are struggling with the language, always ask if the restaurant has an English version (or language of your choice).