Thanks! My orthopedist also mentioned calf stretches. His suggested variations on the standard stretch included stretching both legs at once, and repeating the stretch with the knees bent. (That's kind of awkward to do, but I'm working on it.) I do very little massage, and will work at adding some.

I do quite a bit of standing-on-one-leg exercise as part of my tai chi practice, but it probably is time to step up the difficulty—like doing it eyes-closed.