Proprioception training
According to a 2013 Study, approximately 26% of all ankle sprains are non-contact ankle sprains, meaning that it was likely that balance played some part in the rolling of the ankle. Balance includes more than just the ability to stay standing, it also involves the awareness of where your ankle is relative to the ground, or proprioception.

After recurrent ankle sprains, this proprioception is often lost which is a risk factor for further ankle sprains. To help fix this, balancing single leg on a pillow at home during the ad breaks of the TV can help retrain your balance. (Watching TV might give you more time to practice). If this is too easy, then try closing your eyes for an extra challenge.