Preparation: I'd never been to Stockholm before, so I got out the NYT's "36 hours" feature on it, which wasn't too old. I find the "36 hours" series try to find the very new, very hip, or offbeat places that you might not find in a conventional guidebook. (As I was meeting up with locals for business, I figured I would get plenty of the "standard tourist fare" from them.) Other than that, I looked up my hotel, my meeting places, and a couple of the places in NYT on Google Maps, and figured out how far apart things were. (My hotel was a couple of blocks from one of my meetings, and less than 4km from the other.) As for equipment, I took a helmet, U-lock, gloves, and a bandanna. As I was carrying on all my luggage, I wondered how the U-lock would look to the security screeners. (Outbound, no one asked anything. Coming home, the screeners asked to see it. I said, "It's a bicycle lock." The screener smiled and said, "I know, but she (pointing to the x-ray screener) wants to see it." All very good natured.) Also, a tourist tip: If you visit Stockholm, use the Arlanda Express high-speed train to get into town. Not much more expensive than a bus and much faster. And, you can pre-book on the Web and just use your credit card for ID in and out of town. Painless.
Geography / Geology: Stockholm is an archipelago. I rode on 7 bridge-connected islands when I was there. One of the first things you notice when you catch the Arlanda Express train into town is that the walls of the station itself are cave-like. No structure or walls, just hewn from rock, dark granite like stuff. At first I thought it might be decor, but I learned otherwise. It turns out Stockholm is underlain by a huge granite dome. (Question: what better place for a chemist to develop high-explosive to remove rock?)
Here's a picture of a "working bike". Notice the details. I was particularly impressed by the fact that the framemaker included diacritical marks in the lettering. Nice.
(Soon: A deal that's even better than Stockholm City Bikes..)