Conventional Weaponry - Nine Worlds Prep Time

This weekend, for the first time in my about-twenty-five years of geeky interests, I am off to a convention. I could make excuses for this, but no-one wants to read those. The main upshot is: I am going to Nine Worlds, a convention that takes place at Heathrow Airport but is not about air travel.

Although, to be honest, there are so many sub-genres of geekery represented at Nine Worlds, I wouldn't be surprised to discover there are multiple panel discussions about 747s, but my eyes just skipped over them.

Point being: first con! Big deal, potentially. How am I feeling/preparing/occupying myself?