Travel

Taking the funicular up to the top of the mountain overlooking Bergen
Attending a combination classical and folk concert on Edvard Grieg's estate outside of Bergen
The fish market, where they'll barbecue your choice of seafood on a skewer
Trondheim Cathedral, the northernmost Gothic cathedral in the world
Taking the Hurtigrute ship from Trondheim to Bergen
Taking a self-guided tour of the Hardanger Fjord entirely by public transit (You get a series of tickets and move from trains to boats to buses)
Spending a weekend at my friend's cabin in the mountains
Oslo: the Bygdøy Museums, especially the Folk Museum and the Viking ships
Frogner Sculpture Park
The stunning experience of being caught up in a 150,000-person silent memorial march for the victims of the massacre
The Norwegian Resistance Museum
Taking a canal tour of Stockholm
Seeing the Vasa Museum in Stockholm
Just walking around Old Town and other parts of Stockholm
Riding the clean and fast trains

Food is very expensive. Your hotel will probably include a buffet breakfast: make it one of your two meals a day.
However, the hotels aren't all that expensive by international standards, and all of them seem to have free wi-fi.
Almost everyone speaks English, especially young people. The only place I had to use my pidgin Norwegian was when talking to my older relatives and in buying lunch at the bus rest stop in the middle of nowhere.
If you're bored in your hotel room, you'll find that most of the TV programs are from English-speaking countries and subtitled in Norwegian or Swedish.
If you go in the summer, you'll be amazed at how long the days are. We attended a family reunion on an island near Trondheim (about halfway up Norway) in the middle of July, and it never really got dark. The sun dipped below the horizon at about 11:30 and came back up a couple hours later, but there was always some light in the sky.