I usually diaper up laying down, then I make sure that the front and back are the same about even when I pull up the diaper. As for the tapes, I do the bottom first and make sure they get applied pointing slightly upward, then the top tapes I put on and they are slightly pointed down. I seem to get the best fit that way. With single tape diapers, I always have issues cause I can not get them as tight around my legs as need be to prevent leaks.