I have a hydration pack that I bought for my long walks, an Osprey Raptor 10 (that was designed for biking as well as hiking). I'll bring that along for longer rides, so the water bottle isn't as important. I like the idea of a handlebar mount for my phone. I'll install Strava or Map My Ride pretty soon.

Yes, Cannondale made a good choice with those Panaracer tires.

I hadn't thought of a bell, but it could come in handy at times.

Looking around on other threads, I see that some folks have done some very interesting things with their bikes. I'll keep things simple for now. But down the road, who knows?