I am with Nik there, don't strap it up... Wobble board is great, as well as the standing on one leg whenever you can and closing your eyes while doing so...

Make sure you keep your feet and ankles flexible by doing regular range of movenent (ROM) exercises, like writing the alphabet in the air with your toes, rolling the ankles and also stretch your feet by pushing them through their full ROM with your hands, while gently rotating them... Sitting on your heels is also a good stretch of the front of your feet, as well as your shins and quads... But be careful with that one if you have dicky knees...