I started a stretching routine about a month ago (correct stretching, from Bob Anderson's "Stretching" book, not just something I made up), thinking it would help with post-exercise soreness, but not have much effect otherwise. When I started with the thigh stretch (where you sit on the floor, tuck one leg in, and reach for your ankle with both hands) I could get my grip to an inch or so above my ankle. As of yesterday I noticed that my grip is now actually touching my ankle. And the groin stretch too, before I could only grip my toes, now I can reach just past my toes. Yay!
-Lala