If you want to try something outside the city center this is a really beautiful small gem. They cook delicious seasonal food and have a nice selection of cheese and charcuterie for your wine. Best to book table beforehand. 

When Stockholm is cold and the plants I have at home are dying I like to visit the greenhouse at Bergianska. It's such a beautiful place.

Walk around this lake in the south of Stockholm and in the summer you can take a swim.

During the summer Trädgården is the place to be if your out clubbing. It has a great festival atmosphere. The chance of you getting seperated from your friends is immidiate but you will meet new ones. I have a love-hate relationship with this place, watch out for the massive que and the ill willing pointers.

Small place with low key interior. Perfect for lunch with three small dishes. Lovely vegetarian alternatives.