Ditto to most of what people have said! Go to the Plenary session, it really sets the tone for the week. Go to the Orientation session for first time UC visitors. Study the schedule, and have options for the sessions, some are cancelled or shorter due to presenters not showing. Go to the store on Sunday or early in the week the gear sells out. Same with the pin bins. Go to sessions outside of your field. It is amazing what relates, and it is just super cool to learn the breadth of GIS. I work in utilities and made my coworkers go to some archelogical sessions that were interesting. Don't bring your laptop, be minimal with what you carry, and wear tennis shoes and pedometer. . If you have events at the end of the day be realistic with time. I brought a seperate outfit for evening events, and never had time to change. So either make time to make it back to the hotel to change, or just realize you won't. Lastly...HAVE FUN!
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