A few years back I ran a BESM table-top game, but I haven't run a serious table-top game since. At the moment, I'm preparing to run a lengthy D20 Star Wars campaign, and I'd really like some tips from those of you who have GMed a few games in your lifetime. I'm in the process of finishing character sheets for some of the NPCs the characters might encounter, and I have firmly established the setting for the first game. What else should I do to prepare? I'd appreciate any suggestions/tips you might be able to offer.