Something that's impressed me this year is the influence of weight distribution. In lighter conditions (single trap and less), I'm up at the beam and my crew is either half way to the bridles or rotating out to trap. Goal is to get the lee transom up, but not quite clearing the water. Efficiency through the water seems to really be affected by this. I'm on a different boat, so ymmv.

C2 seems to like her nose in it as long as we're not getting major decels from the waves. Staying in the groove hasn't been too crazy tough, but you can't let your attention wander. When I'm up front, I steady the tiller extension via the side stay so I don't jerk it around too much.

Edit: Getting the nose down effectively rakes the mast further forward as well for a combined affect.

Finally, I'm not winning any regattas just yet, so take all this accordingly...