#5 leave kakariko from the south, cross the first bridge and turn left immediately and walk for a little bit and youll be able to see it on a huge rock in the middle of the ravine.
#6 right after you kakariko from the north, its immediately to your left, its right at the edge where the grass starts.
#7leave kakariko from the south again, and cross over the first bridge, then on the wall to your right youll be able to see it. shouldnt be too hard for you to find, its somewhat near the main path.
oh and theres TWO heart pieces in every dungeon.
and as for a stratagy guide, for zelda i wouldnt get one, the only thing you really need is a list of all the heart locations, since the main challange in zelda is figuring everything out, and with a stratagy guide, its kind of a waste. might as well just be watching someone else play