There's something about push-ups that makes me feel so accomplished after I've finished a set. The total body exertion gets my heart rate up and I feel stronger after doing them. I like to challenge myself by doing at least one extra push-up than I did the last time, and I keep things interesting by varying the pace of my push-ups.
The classic push-up is a great way to tone your upper half, and changing the pace anywhere from two to four counts while lowering yourself toward the ground, as well as when you are pushing yourself up, will create an added challenge. If your goal is 20 push-ups, try doing 10 of those push-ups taking two counts on the down and two counts to get back up. Work toward taking four counts to lower yourself and to push yourself up. This will keep your body guessing and help you avoid any kind of push-up plateau. If you need a refresher on how to do a proper push-up, check out my tips.