Some of the exercises that tone and shape the glutes and hamstrings include doing squats, lunges, cable glute extensions, leg press, stiff-legged dead lifts, back kicks and side kicks. You could also try standing knee raises. However, you can also be wearing heels, because they change the natural curves.
Bulgarian squats. put one foot on a bench and the other out in front of you and squat. Put weights in your hands. If you don't have weights us a bag of flour... or I use my dog sometimes. She's about 3 kilos. Google Images will show you what to do.