Push-ups -- we've all done 'em, but sometimes they just don't look so pretty. Fear not! We've got the guide to get it right. Push-ups are a total-body functional move that are great for increasing strength, much like bench-pressing, and have the added benefit of engaging the core and lower body (thanks, gravity!). The bodyweight exercise can be done just about anywhere -- with a ton of variations to liven things up. So let's drop down and do the perfect push-up.