|Most keel boat sailers allow the yacht to heel moderately in light conditions so that the weight of the boom and sails holds the sails in a reasonable shape with maximum draft. |
In light conditions, starting on a reach and heading up wind as boat speed develops to take advantage of the apparent wind moving forward is the traditional way of getting some movement. I am mainly a cruiser so strategies when racing may vary.
I did see the American J24 world champion sail in very light conditions about 10 years ago. His sails looked a bit like an un-ironed shirt as they leaned the boat over eased everything and showed everyone a leason in sailing. The rest of the fleet never really caught up after they established a lead and kept a handy speed advantage with the rest of the fleet for the race.
I suppose all boats are different but in light airs, I am happy to let it all hang loose, lean to leeward and try and get the sail's tell-tails streaming. If that fails, then the engine is a nice accessory.