Picked this one up from a friend. Do not rely on the breakfast. If your hotel has a fridge then find a convenience store, buy some cereal, milk, and disposable spoons/bowls. Have breakfast in the comfort of your hotel room and start the day with the fuel tank full.
TechEd is not a good location to start using a tablet or OneNote for the first time. Start using them beforehand if you want to keep lots of notes.