Two anatomical bits that often need some flexibility work are the hips and hamstrings. And wouldn't you know it, we've got tutorials for both. :)
Hip flexibility and mobility are critical to everything from squats to bridges, not to mention things like walking, running, and even sitting well. This tutorial shows you 8 different stretches to boost your hip flexibility and mobility.
Whether you're a sit-and-reach champ or you have to bend your knees to touch them, adding some stretch to your hammies will improve nearly every physical activity you can fancy. This tutorial offers a bunch of stretches to limber up your legs. Both tutorials include video guides to show exactly how to perform each stretch and integrate it into your training.
Plus, don't forget your ankles and feet.