Training Tips
Smashing your legs and body is going to take a toll eventually. If you are competing in a running only event, it means by default you are probably running more often during the week. This will catch up with you if you don't recover properly.
“Your body will handle the crutches, but your mind won’t handle the sideline.”
Recovery Tips
Recovery can take many forms - ideally you'd have a sports massage once a fortnight a few months out from the event. Then 4-6 weeks out, a massage a week is optimal. But this can get pricey so be smart about when you have them. If you choose not to, which is fine, then things like compression socks, foam rollers, heat packs, anti-inflammatories, a decent stretching routine, a spa/bath etc would all help too.