How to do sightseeing before the tourist invasion?
You need to get up pretty early, or take me as an example and don’t go to sleep at all. Location is empty, photo friendly, and the light make the architecture magical. You have then time to enjoy every piece of it and there is no need to go through the crowds.
I managed to see Bergen main points in the guidebook before 7 o’clock. Then I took first train up on the top of Fløyen at 7:30, to enjoy the panorama of Bergen sharp at 8 o’clock. Unforgettable!