Important stuff if you’re into doing Olympic lifts.
Tools: little box, rubber band, superfriend (optional)
Time: 2 minutes, 40-50 reps each foot (front and back)
Do the band distracted ankle stretch, with foot on the box and knee pointing outside. Have a friend control your foot placement and to keep it from collapsing in on itself.
If you do this on your own, just use something that else (like a small ball, or a small fractional plate) to put under your foot on to maintain that arch.
Check out more drills on Mobility 101.