Finding the place to go to was the time consuming bit, but once we figured that out the rest was easy (book a hotel, rent a car etc). So, we ended up in Borlänge - Dalarna ... not bad at all, if you ask me.
We could have gone by train, but we decided to take the car as we thought we'll see more things that way; and we weren't disappointed.
Getting out of the city took some time and gave us the impression/realization that the city is quite larger than we thought. And it has lots of interesting sights: the Haga Park with its Fjärilshuset, the Upplands Väsby neighborhood ... really nice sights (no photos here, though).
And then Dalarna, which is mostly how one would expect it to be: lots of forests and lakes ... very idyllic in some places. (Another attraction, besides nature's sights & small towns, are the stores (mostly outlets) and restaurants along the highway.
:) But that's optional ...)
Borlänge is a small town that just happens to have a really neat ski resort 10 km away; I'm talking about Romme Alpin. Very handy.
I really like the narrow streets in the center, the nice little shops, the cafes, the thai restaurant around the corner from one of the side streets... just a good ol' relaxing felling over all.
It's definitely a place I'll revisit.