"For ladies who want to firm up their sagging busts, I will recommend criss cross press. Just to manage expectation, this chest workout does not boost bust size, but to prevent them from sagging when you age. Proper strength training like this exercise will enhance the pectoral (chest) muscle below the breasts."
Running and Strength-Training Workout | 30 minutes
The best way to learn how to squat correctly is to do squats facing a wall. Bring your toes to the wall, almost touching, then sit down. Stay looking straight so you learn to keep your torso up. Sit as low as you can go then hold the seated position for 5-10 seconds and repeat. Great for butt, legs, and core.