Cycling is a very popular mode of transport in Amsterdam, which is why the city is covered with cycling lanes. You should always take caution when crossing roads as cyclists can come out of nowhere!! You can hire bikes from around 8 Euros per day if you choose to cycle around.
Trams are a popular way of getting around. You can buy 24 and 48 hour tram passes (longer if needed) for a reasonable price, however I did find the trams to be quite confusing as tram conductors would often tell you the wrong tram to take.