Using your own body weight is one of the easiest and most convenient forms of strength training. You can do it around your daily schedule, and best of all its free!! Some of the benefits of strength training are
It will help you to control your weight. As you build muscle, your body will burn calories off faster and more efficiently
It will tone your muscles, giving you a firmer, tighter look.
It helps to strengthen your bones, and in turn will help to reduce your risk of osteoporosis and other bone related problems.
The following exercises are just a few suggestions that work to help strengthen and tone different areas of your body ... Full Body
Step ups Shoulders and arms
Arm circles (windmills) Core
You can take any of these exercises and form your own workout program to target specific areas.
Feel free to add any further info that may be beneficial in helping others learn the basics of body weight strength training