Two things I can think of off of the top of my head are good boots with a stiff sole, and proper suspesion set up for your weight and the terrain you are riding in; these two things could have saved me a whole lot of grief last spring when I tore both achilles in half and broke my right ankle. My suspension was set up good for woods riding, but not for the track, I was wearing AXO RC 4's at the time, but now I've got Tech 8's and they offer 100% better support. Every situation is different, but in my situation I wish I would have bailed, and took my lumps on the ground. If you are going to stay with the bike I would recomend having the weight centered over the foot surgery and rehab on the achilles really sucks, and the wife does't seem to find the 8" scars on both ankles to appealing either :confused:
Before I start hitting anything to big this year I will be investing in extra wide foot pegs also.