Yeah, I'm guessing breakfast would have helped quite a bit. I don't normally eat it and I regretted that decision when I got to work, and had half of my sandwich when I got here! No water bottle either because I didn't expect it to be an hour long trip, but I'll definitely have one with me next time.
Bike seat seems like the right height to me, I spent a while adjusting it to where I think it should be, but I've never had it professionally set up or anything. That's likely a good idea too.