When I meditate, I usually sit in what is referred to in the United States as Indian style. The problem with this position is twofold: 1) It isn't very stable and 2) after ~15 minutes I find myself straining to keep upright. I have been told that the full lotus position is more stable since the legs are symmetric and both knees are on the ground. I've tried to get myself into the position, but I am not even flexible enough to get into the half lotus position (one foot on the other knee).
My question is: If I am willing to work at it daily; what is the best way to get my legs flexible enough to sit in the full lotus position?
Picuture from Wikimedia Commons http://upload.wikimedia.org/wikipedia/commons/7/7d/Tanum%C3%A2nas%C3%AE_en_Meditacion_Loto_Padmasana.JPG *Picture from "Tanumânasî en Meditacion Loto Padmasana" by Jesús Bonilla (Tanumânasî) - Retiros de yoga. Licensed under Public domain via Wikimedia Commons.