Does anybody use plot/encounter tables to create on the fly leads? I used to have access to an awesome pdf about Gamesmastering in general which had a whole bunch of them in it but I lost it when I had to hand my ipad back into work. Maybe you can point me to some how to GM books which you guys like which has them in them or maybe your own system that you use. My goal is random scene generation here, not something I think of and then run beforehand but something I roll at the table think for a minute and build it on the fly. I already do the former, now I want to do the latter. Some with a sci-fi theme would be most helpful.