There is an existing thread with recommendations from when I went lest year- just search on it.
My three favorites of the trip entertaining-wise:
the very small Tulip museum - totally unique and fun ( no more than an hour to do this- on a lovely canal section by the Anne Frank museum
Renting a bike and riding it all over town ( highly recommend)
The newly done Maritime museum
( I did not have time in 36 hours to go to the large museums or the flower market but I know they are great)
I had a fabulous meal outside of downtown at Wilde Zwijnen. Great choice ( recommended by Mark Bittman) on east end of town. The 3 course Chef's tasting was fantastic! ( and at great value at 30 euros). Every course was perfectly prepared and great flavors; service was very good and very friendly/helpful. High recommended!! http://www.wildezwijnen.com/contact.html