Hay nets should be hung so that a horse cannot get a foot caught. Even ones hung high enough initially might get too low as they empty. Buckets and feed tubs should be secure to the wall. They should be hung high enough to keep a horse from planting a foot inside the bucket during the normal course of events, such as pawing or fighting. Make sure there is nothing to catch a blanket or halter, if you choose to leave either on in the stall.
Buckets hanging with several different types of snaps can cause bad eye and nose lacerations.
Many of these can be made safe by turning the snap around so the clip part is facing inward. All snaps should release quickly at both ends. As in the aislesways, lights should be in cages and out of reach of active horses. If you hang a stall toy, hang it from a single cord. A loop of rope is an invitation for a horse to get stuck.