There are four means of public transportation in Amsterdam: train, bus, tram, and metro. Wherever you want to go in Amsterdam, this website provides a journey planner involving any of these four means. This website is the official website of the municipal transport company of Amsterdam, including a map and schedules for buses and trams. This website is the official website of the principal railway company of the Netherlands, including a journey planner for trains.
A weather forecast can be found here at the Wunderground.
Hotels and locations
For help with sightseeing in Amsterdam, here are some useful websites: