The city's biggest flea market is hosted the first weekend of each month in and around a gigantic warehouse in the industrial area of NDSM in Amsterdam Noord. I love to snuff around the hundreds of stalls to find unusual props. Taking the boat to cross the IJ and leaving the old centre behind is very refreshing. Make sure to also have a drink in Noorderlicht while the sun sets.

Located under Q-Park, Waterkant is ideal for sunny days since you can get direct sunlight until late evening. Grab a beer and a table on the terrace and enjoy sunny Amsterdam while it lasts. Note: if you get a bit tipsy you think you see a double Guggenheim

A tiny record shop that has all the character you'd want.  They also sell produce out front which gives it even more character. 

This place has, beside the excellent pastry, the best shrimp croquettes in town. 

Her I enjoy the quit and concentrated atmosphere. I go to the library if I need some new input or just want to work somewhere else than in my studio. You can also just go there to relax at one of the beautiful spots in the building. Or have some food at the top floor with a beautiful view over Amsterdam.