The other great exercise for sculpting wonderful arms for the summer is tricep dips. The triceps are the muscles in the back of the arms.
Dips are great because they are a body weight exercise and can be done anywhere there is a chair or bench.
First, make sure that the bench or chair is stable and won't move.
1) Sit on the very edge of the bench/chair with your hands on the edge of the bench very close to (touching) your body. 2) Pull your elbows in towards each other behind you and roll your shoulder blades back. 4) Bend your knees and walk your feet back so that your ankles are under your knees. 3) Slide your body forward so you are no longer sitting on the bench but your back and butt is touching the bench. 4) Bend your elbows and lower your body down as far as possible. 5) Push straight back up.
Repeat this as many times as you can working your way up to 15 straight reps. When you can do 15 reps without a break, you can try doing dips with your legs straight out.
It is important that you keep your body against the bench and that you use your arms to perform this exercise. Do not move your hips or any other part of your body.
Do 2-3 sets of these 2-3 days a week with your pushups and your arms will be the envy of all your friends!
Here is a good video of how to do tricep dips. (I know he is a man, but he shows good technique) :)