When in the mood for good coffee in Amsterdam, go straight to Lot Sixty One!
The small coffee shop (and roastery) on Kinkerstraat is, in my opinion, the best place for coffee in the entire city.
Not only is their coffee extremely good, they`re very friendly people as well.
At Lot Sixty One you feel welcome, you get a good cup of coffee and, if you`re lucky enough to find a seat by the window, then you can enjoy all these while watching the world go by.
Check this post for more coffee inspiration in Amsterdam.