Buy tickets in advance and get travel insurance.
Ride first class on trains. Think crowd, or comfort? Delays?
Get your tickets in advance & save a bundle. A bundle.
Don't like your seat? Call the airline and move around.
Use a shuttle over a taxi for airport travel to town and save.
Ride the metro/tube and get an unlimited multi-day pass.
Did I mention buying your tickets in advance? Shop online.
Use a bank ATM machine. Get just enough, you can go back.
Use a money belt and or a money pouch for large amounts.
Use a coin purse and a wallet for smaller amounts.
Left over change...instant souvenirs for yourself, or kids!
Buy only a small amount of snacks/drinks at a store.
Restaurants, try something new. It won't kill you.
If you don't normally eat from a street vendor, why start?
They feed you on the plane. Eat and drink. Saves time later.
Don't eat what you can have back at home.
Use a tour bus the first day to get the layout of the land.
Get a museum pass. Skip lines sometimes and save a bundle.
Some tour buses offer a second day at a low rate. Get it.
Most tour buses let you get off and on at different stops.