Exercise must not be complex nor radical to be effective.  This means that when you’re working out, perform exercises that challenge the whole body to work together.  For example: Deadlifts, walking lunges, step-ups, jumps and jumping rope  are all fantastic ways to strengthen, and really tighten up your glutes and hamstrings.  Pull ups, chin ups and rowing variations are great choices for a strong and great looking back.  Push ups and its variations not only work your upper body and your core, but also create stability in your upper back and scapula, which improves posture and shoulder health. 

Free-motion and resistance-band presses and pulls are also great fullbody movements.  Incorporate these exercises into your weekly training sessions and work them hard!  I mean seriously, you need to be sweating your BUTT off!  For hard, toned muscle, lower your repetitons to 6-8 and use perfect form.  Be active, eat fresh and clean food, be strong and be happy!