On the Tornado in light air and small chop, I've found taking the spin sheet from the crew allowed me to coordinate helming & sheeting much much better. This might not be better once you & crew have lots & lots of experience...but it sure helped us gain lots of places and eventually to finish 1st in a distance race last year.
Other tips I've learned...never oversheet the spin...if in doubt, ease it out and keep it on the verge of collapse/luff curling periodically for max power.
To carry the spinny higher in a breeze, try easing off halyard and/or tack line. This has the effect of flattening the luff, thus de-powering and giving more "point" to the sail.
In light stuff, crew goes to leeward and at or forward of the main beam...leans outboard holding trap handle. Helm sits as forward as possible (dependant on tiller length) and moves in board, typically near the mast. This lets us lift the hull in some really light stuff. But, don't make the mistake of trying to lift it at all other costs. There comes a wind speed when it just doesn't pay to keep heading up...sail flat and go for VMG...just be ready for the puffs to get the hull out.
Tornado CAN 99 "Full Tilt"