Do ankle eversion exercises to strengthen the peroneal muscles, the muscles on the outside of the calf. These muscles mimic the same function of the ligament(s) that were torn on the outside of the ankle (if you had an inversion sprain). The exercises can be done with a Theraband or with a cuff weight around the foot. The movement is pulling the pinky toes out to the side and then returning to a neutral position. Do not let the rest of the leg move.
Closed kinetic chain and proprioceptive exercises are important to prevent re-injury. That means hip, knee and ankle exercises, both strengthening and endurance. Balance and agility drills help the joint receptors work so that the muscles around the joint perform in a reflexive way.