Simply use the main and jib sheet to control the leech tension and hence pointing. Just as in light winds, if the boat feels stalled and seems to be slow, try easing the sheet. Jib cars will start to ease forward from the very light winds to exert more tension on the leech of the jib.
As in very light winds, the centreboard will be adjusted for the point of sail and balance will be very important. Trim may be less important, but still check the transom for drag.