What gets me and my group at times is what actually creates a Face to Face roll. Not the regular stuff, but the really rare, once in a blue moon stuff. Regardless, Face to Face is probably a good topic, as it is one of the more unique aspects of Infinity. Another topic is Hacking, the real indepth stuff, like how to aggressively hack, and how to defend against it. Probably more tactics than How to Play, but still.. Looking through the options and how to use them is probably a good topic. Perhaps a topic on deployment? What skills impact it (Strategos L2/3, Infiltration, Forward Deployment, AD, et.c), when you would choose deployment over turn order (List considerations, important terrain pieces, mission), what to look for in your opponents deployment. Just some ideas. Hope they're helpful!