I find I put in far fewer sutures than most of my midlevels do (I've seen them pack 7 into a 2.5 cm lac), as I think the inflammatory response from the sutures delays healing. Usually I'll follow Wilco's principal (hardest stitch goes in first) for anything that has cosmetic importance, then put in sutures till it doesn't gape with light lateral pressure. Remember that the only thing the sutures do for healing is hold the wound edges together, so go till you've got enough sutures to do that with reasonable certainty. Anything after that is wasting your time and increasing the risk of poor healing.
Also, for the love of all that is holy, leave tails long enough to grasp through the crusting that will be there on day 3, or 5, or 7. Better yet, use absorbables.