Museumplein is a fantastic area to stay in during your trip to Amsterdam. Its got all the main museums nearby, as well as shops and cafes around and the beautiful Vondelpark. Also, it's only a 30-40 minute walk into the centre, crossing over the lovely canals and passing quaint shops and cafes. Tram and bus stops are also all around.
I would recommend Vondelpark and you must visit the Rijksmuseum for the 'I amsterdam' sign outside!