Las Vegas buses and taxis
Keep plenty of small denomination dollar bills with you as neither buses or taxis are likely to have/give change.

Taxis in Rome
When in Rome, watch out for bogus taxis without meters. They charge a fortune for the ride, and have been known to drop you miles away from your destination.

Stays in Cuba
Whenever you're going to visit Cuba, never stay in hotels but stay at casas. You stay with the Cuban people in their house, it is cheap, fun and you get to know the real life which is very different. You will come back with a special feeling.

Duty free at Heathrow
Don't do it!!! If you are travelling to SE Asia do not bother with the rip-off joint that is called duty free. On arrival at Changi, Singapore you can buy your booze as you leave immigration, usually cheaper. But the bargain has to be Langkawi in Malaysia. Last year I bought a litre of Gordons gin at KL Int.Airport for about £6.50.(Well pleased.) This year in the duty free island of Langkawi, I paid £3.20 (22 ringgit). Even better pleased.

Egyptian tip
Be brave! Don't settle for the overcrowded, over-priced 'cram in as much as possible in half a day' organised tours to archaeological sites....head for the felucca captains specifically moored in the precincts of your hotel, they all know local guides, drivers etc.. You'll get a much better price and these people benefit from the cash they so desperately need - rather than giving all your money to the UK-based holiday companies!