Taxi's are available everywhere, but please do use legal taxi's and not some guy that runs to you offering you a ride. At Schiphol we had - until recently - the blessing not to have this annoying guys, but now-a-days the appear from nowhere, ruining the market. Taxi's in Amsterdam are relatively expensive, but very trustworthy. A legal driver will never try to trick you or drive extra distance to get some extra money.
Another thing to tell about is the canals and there initial value. Now-a-days however barely seen: transport. Boats are not running up and down the canals anymore to fill the warehouses. There is still traffic on the Amstel though as well as in the busy "IJ", harbours and Amsterdam-Noordzee-canal. This last connects the capitol now-a-days directly with the Northsea and keeps it being an important harbour of the world.
Careful when you grab a cab, especially at the airport. There will be people in the airport that try and talk you into taking their cabs, but they aren't real cabs. Take only cabs from the designated cab areas.
Taxis are normally not hailed in the Netherlands, but taken from a taxi rank, of which there are many (there is an environmental advantage to this: taxis aren't constantly driving round looking for custom). Taxis are good quality but relatively expensive; around €1.50 per km regardless of day or time. You don't need to tip more than rounding up: they are already expensive enough.
You're not supposed to hail a taxi in the street - though occasionally one may stop - as there are ranks dotted around the city. The best places to find taxis are outside Centraal Station, the bus station at the junction of Kinkerstraat and Marnixstraat, Rembrandtplein and Leidseplein. You can't book cabs in advance, but if you call Amsterdam's 24-hour central taxi control on 6777777, a taxi will arrive almost immediately (though be prepared to wait if it is raining on a Friday or Saturday evening as the line is often busy, but there's a telephone queueing system).
Wheelchairs will only fit in taxis if folded. If you're in a wheelchair, phone the car transport service for wheelchair users on +31 (0)20 6333943 (generally open 9am to 5pm, Monday to Friday). You'll need to book your journey one or two days in advance.
In addition to all the trams, they also have bike taxis. I mostly walked
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