Be sure to incorporate back exercises in to your workouts. Too many people go to the gym and jump on the bench press or chest press machine but forget all about the back. Working your back improves your posture. Working your back also makes your waist look smaller. Back exercises give you the v-taper. This is a very important part of the body. On my back Days I do hamstrings as well.
Sample Exercises for the back
Pull-ups
Modified pulls on smith machine
Seated Rows
Dumbbell/Barbell rows
T-Bar Row
Lat Pull down
Dead lifts (also works the hamstrings)
Reverse Flies (rear Delts)
Dumbbell pull overs
I welcome any questions you may have about this.