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.