How to push?

Every one know how to do push up. You can choose various style. also you can adjust the distance you put your two arms as the main support. I suggest you to put your two arms about as wide as the shoulder width. 3 - 5 reps would be great for the beginner, the keyword is still " concentrate ".
Exhale while you lift your body up, inhale while doing the opposite way, think about the area you want to gain. Usually the tight and firm chest is everyone's target ( not matter it's a man or woman ). Try to move your body upward with your chest power as a starting point. ( not entirely using your arms ). You"ll feel a little sore around chest area, but it will gain the good shape, thus you"ll get your shoulder and arms progressing to the better shape.
Again, just take it easy, don't try too hard, because it will cut down your enthusiasm and end up with frustated feeling. It doesn't mean you get nothing with only 3 or 5 reps, as long as you do it properly, your pain will gain a sweet fruit for you.