Rent a Bike
It's fast, it's great fun and it's perfect if you are a little too stoned too sit in the tram on your tour from coffeeshop to coffeeshop. The city is designed for cycling, in Amsterdam the bicycle rules the road. Virtually everyone in Amsterdam owns a bike. It's good for the environment and it's the way to see a lot of Amsterdam.
The city is very bike friendly, separate bike lanes line most major streets. Cost are about €15-20 per day. Make sure to get a good lock, and to use it; Amsterdam has many bike thieves. Note that if you are offered to buy a bike at prices of a day´s rent they are probably stolen bikes.
MacBike Amsterdam Quality bicycles (also with manual brakes).
Bike City Inconspicious bicycles so you don't look like a tourist right away. Sounds good eh