My priority:
1. Take a trip with Nautilus
2. Visit danish submarine and warship
3. Visit Royal Danish Naval Museum
4. Take a trip in Tivoli
Probably not:
5. Canal Tour
Been there, seen it... being local and all. But for the rest of you, it would probably be interesting.
If the chronological order put's this event at another order, I may wait in a cafe in Nyhavn.