Vrksasana (Tree Pose) 

Vrksasana helps improve your balance and stability in the legs. It also strengthens the ligaments and tendons of the feet, as well as strengthening and toning the entire standing leg, up to the buttocks. If that's not enough, it helps on a metaphysical level, too, helping one achieve balance in other aspects of your life.

Hopefully you've got the hang of Tadasana, because that's where we'll start. From Tadasana, steady your gaze straight ahead, shifting your weight onto your left leg. Bend the right knee and place your right foot high on inner left thigh, in the middle of the thigh, with toes pointing down. Join your hands into Namaskarasana (Prayer Position) at the sternum, balance, then raise and stretch the arms above the head, keeping hands together. If your elbows bend, then take hands wide enough apart to straighten the elbows.

Press leg and foot together, stretch inner thigh of bent leg towards the bent knee, as in Baddhakonasana, and draw outer right thigh into hip. Make sure that standing leg stays vertical by pressing top of thigh back and lifting outer thigh to hip.